fix: use wasm-bindgen spawn_local for wasm tasks

[joii2020]

This fixes a fiber-wasm crash.
The page crashes after being left idle for a period of time after the channel is created:

75f2baef-8e88-4895-b818-2d5b74f99f30:1 panicked at /home/joii/code/fiber-dev/fiber/crates/fiber-lib/src/tasks.rs:69:10:
`spawn_local` called from outside of a `task::LocalSet` or `runtime::LocalRuntime`

Stack:

Error
    at __wbg_new_227d7c05414eb861 (blob:http://localhost:5173/75f2baef-8e88-4895-b818-2d5b74f99f30:1:8400)
    at wasm://wasm/0273d6d6:wasm-function[2304]:0x53a34e
    at wasm://wasm/0273d6d6:wasm-function[4861]:0x645172
    at wasm://wasm/0273d6d6:wasm-function[4156]:0x61c5c2
    at wasm://wasm/0273d6d6:wasm-function[6306]:0x674a73
    at wasm://wasm/0273d6d6:wasm-function[517]:0x2acabf
    at wasm://wasm/0273d6d6:wasm-function[4000]:0x6060e5
    at wasm://wasm/0273d6d6:wasm-function[280]:0x16d8c1
    at wasm://wasm/0273d6d6:wasm-function[341]:0x1d5b5b
    at wasm://wasm/0273d6d6:wasm-function[1487]:0x45d017


__wbg_error_a6fa202b58aa1cd3 @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
$func2304 @ 0273d6d6:0x53a41b
$func4861 @ 0273d6d6:0x645172
$func4156 @ 0273d6d6:0x61c5c2
$func6306 @ 0273d6d6:0x674a73
$func517 @ 0273d6d6:0x2acabf
$func4000 @ 0273d6d6:0x6060e5
$func280 @ 0273d6d6:0x16d8c1
$func341 @ 0273d6d6:0x1d5b5b
$func1487 @ 0273d6d6:0x45d017
$func2558 @ 0273d6d6:0x563015
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
setInterval
__wbg_setInterval_c134f8826a82ba51 @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
$func4539 @ 0273d6d6:0x632261
$func1358 @ 0273d6d6:0x44283d
$func1410 @ 0273d6d6:0x44d095
$func2558 @ 0273d6d6:0x563015
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
75f2baef-8e88-4895-b818-2d5b74f99f30:2 Uncaught RuntimeError: unreachable
onerror @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
setInterval
__wbg_setInterval_c134f8826a82ba51 @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
$func4539 @ 0273d6d6:0x632261
$func1358 @ 0273d6d6:0x44283d
$func1410 @ 0273d6d6:0x44d095
$func2558 @ 0273d6d6:0x563015
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
75f2baef-8e88-4895-b818-2d5b74f99f30:1 panicked at /home/joii/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/wasm-bindgen-futures-0.4.64/src/task/singlethread.rs:132:37:
RefCell already borrowed

Stack:

Error
    at __wbg_new_227d7c05414eb861 (blob:http://localhost:5173/75f2baef-8e88-4895-b818-2d5b74f99f30:1:8400)
    at wasm://wasm/0273d6d6:wasm-function[2304]:0x53a34e
    at wasm://wasm/0273d6d6:wasm-function[4861]:0x645172
    at wasm://wasm/0273d6d6:wasm-function[4156]:0x61c5c2
    at wasm://wasm/0273d6d6:wasm-function[6306]:0x674a3b
    at wasm://wasm/0273d6d6:wasm-function[8255]:0x69b26d
    at wasm://wasm/0273d6d6:wasm-function[2558]:0x563083
    at wasm://wasm/0273d6d6:wasm-function[6863]:0x6841d5
    at wasm://wasm/0273d6d6:wasm-function[5608]:0x663954
    at wasm://wasm/0273d6d6:wasm-function[6785]:0x683311


__wbg_error_a6fa202b58aa1cd3 @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
$func2304 @ 0273d6d6:0x53a41b
$func4861 @ 0273d6d6:0x645172
$func4156 @ 0273d6d6:0x61c5c2
$func6306 @ 0273d6d6:0x674a3b
$func8255 @ 0273d6d6:0x69b26d
$func2558 @ 0273d6d6:0x563083
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
setInterval
__wbg_setInterval_c134f8826a82ba51 @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
$func4539 @ 0273d6d6:0x632261
$func1358 @ 0273d6d6:0x44283d
$func1410 @ 0273d6d6:0x44d095
$func2558 @ 0273d6d6:0x563015
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
75f2baef-8e88-4895-b818-2d5b74f99f30:2 Uncaught RuntimeError: unreachable
onerror @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
setInterval
__wbg_setInterval_c134f8826a82ba51 @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
$func4539 @ 0273d6d6:0x632261
$func1358 @ 0273d6d6:0x44283d
$func1410 @ 0273d6d6:0x44d095
$func2558 @ 0273d6d6:0x563015
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
0273d6d6:0x61c5e8 Uncaught RuntimeError: unreachable
    at 0273d6d6:0x61c5e8
    at 0273d6d6:0x674a73
    at 0273d6d6:0x2acabf
    at 0273d6d6:0x6060e5
    at 0273d6d6:0x16d8c1
    at 0273d6d6:0x1d5b5b
    at 0273d6d6:0x45d017
    at 0273d6d6:0x563015
    at 0273d6d6:0x6841d5
    at 0273d6d6:0x663954
$func4156 @ 0273d6d6:0x61c5e8
$func6306 @ 0273d6d6:0x674a73
$func517 @ 0273d6d6:0x2acabf
$func4000 @ 0273d6d6:0x6060e5
$func280 @ 0273d6d6:0x16d8c1
$func341 @ 0273d6d6:0x1d5b5b
$func1487 @ 0273d6d6:0x45d017
$func2558 @ 0273d6d6:0x563015
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
setInterval
__wbg_setInterval_c134f8826a82ba51 @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
$func4539 @ 0273d6d6:0x632261
$func1358 @ 0273d6d6:0x44283d
$func1410 @ 0273d6d6:0x44d095
$func2558 @ 0273d6d6:0x563015
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
0273d6d6:0x61c5e8 Uncaught RuntimeError: unreachable
    at 0273d6d6:0x61c5e8
    at 0273d6d6:0x674a3b
    at 0273d6d6:0x69b26d
    at 0273d6d6:0x563083
    at 0273d6d6:0x6841d5
    at 0273d6d6:0x663954
    at 0273d6d6:0x683311
    at Hg (75f2baef-8e88-4895-b818-2d5b74f99f30:1:16826)
    at F (75f2baef-8e88-4895-b818-2d5b74f99f30:2:687)
$func4156 @ 0273d6d6:0x61c5e8
$func6306 @ 0273d6d6:0x674a3b
$func8255 @ 0273d6d6:0x69b26d
$func2558 @ 0273d6d6:0x563083
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2
setInterval
__wbg_setInterval_c134f8826a82ba51 @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
$func4539 @ 0273d6d6:0x632261
$func1358 @ 0273d6d6:0x44283d
$func1410 @ 0273d6d6:0x44d095
$func2558 @ 0273d6d6:0x563015
$func6863 @ 0273d6d6:0x6841d5
$func5608 @ 0273d6d6:0x663954
$wasm_bindgen__convert__closures_____invoke__h476c54af626292ed @ 0273d6d6:0x683311
Hg @ 75f2baef-8e88-4895-b818-2d5b74f99f30:1
F @ 75f2baef-8e88-4895-b818-2d5b74f99f30:2