Add JSON.SET FPHA support (8.8)

[mgravell]

1. unmark 8.4 APIs as [Experimental]
2. support JSON.SET FPHA, with tests to validate round-trip

the shipped/unshipped had been jumbled, so have been reset; the only delta is the FPHA overloads

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Note

Medium Risk
Expands the public API surface (new JsonNumericArrayStorage and new Set/SetAsync overloads) and changes how JSON.SET arguments are constructed, which could affect compatibility with different RedisJSON versions.

Overview
Adds JsonNumericArrayStorage and extends JSON.SET (JsonCommandBuilder.Set, JsonCommands.Set, JsonCommandsAsync.SetAsync) to optionally emit the FPHA modifier for numeric array storage (BF16/FP16/FP32/FP64), while hiding legacy overloads to steer callers to the explicit option.

Removes [Experimental] markers (and the NRS001 warning suppression) from previously gated 8.4 Search/Vector/Hybrid APIs and updates PublicAPI.Shipped/Unshipped accordingly, plus adds JSON round-trip tests validating FPHA behavior (skipped unless Redis >= 8.8).

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[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

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