New shell backend#21

Draft

tryone144 wants to merge 7 commits intocryptool-org:masterfrom

tryone144:new-shell

Commits on Mar 9, 2026

Initial implementation of a new shell+tty based on local-echo
tryone144
committed

Commits on Mar 16, 2026

Add support for command history in new shell
tryone144
committed

Commits on Mar 29, 2026

Commits on Mar 30, 2026

Simulate closing of stdout and stderr for more reliable output waiting
tryone144
committed
Update input line parsing and splitting into separate commands
tryone144
committed
Add interface for evaluating/running a single line
tryone144
committed