Add temperature emitter and query APIs

[diffuin]

Requested by @ifBars in #237.

Summary

Adds a public cross-runtime S1API.Temperature API for:

• creating or retrieving native temperature emitters on mod-owned game objects;
• reading and configuring emitter temperature, linear range, and world position;
• subscribing to emitter changes through managed Action handlers;
• taking immutable managed snapshots and querying the native temperature algorithm;
• reading the native system-enabled state and using the game's Celsius/Fahrenheit helpers.

Grid registration, persistence, networking, custom heatmaps, and gameplay effects remain out of scope.

Implementation notes

• Keeps native ScheduleOne and Il2CppScheduleOne types behind the public wrapper boundary.
• Exposes ranges in world units and performs the native squared-range conversion internally.
• Clamps finite emitter values to the native bounds and rejects non-finite scalar/vector inputs.
• Shares event-registration state per native emitter so a handler can be removed through any wrapper for that emitter, including IL2CPP delegate conversion.
• Provides TemperatureEmitter.ToInfo() as the safe snapshot path.

Validation

• dotnet build S1API.Tests/S1API.Tests.csproj -c MonoMelon: passed with 0 warnings and 0 errors.
• Complete Mono suite: 640 passed, 0 failed, 0 skipped.
• dotnet build S1API.Tests/S1API.Tests.csproj -c Il2CppMelon: passed with 0 warnings and 0 errors.
• Complete IL2CPP suite: 626 passed, 0 failed, 0 skipped.
• Live Mono smoke (Schedule I_alternate): passed emitter creation, clamping, position/setter flow, event delivery, cross-wrapper removal, snapshot/query behavior, formatting, normalization, system-enabled access, and invalid-input rejection.
• Live IL2CPP smoke (Schedule I_public): passed the same contract, including converted-delegate cross-wrapper removal.
• Disposable probes and deployed test assemblies were removed, and both game installations were restored to their original mod sets and logs.

Compatibility

• Source: additive relative to stable. This PR's unpublished snapshot constructor was corrected from squared range to linear range before merge.
• Binary: additive relative to stable; no existing stable public member was removed or changed.
• Behavior: existing stable behavior is unchanged. New setters and snapshots follow the native 0-40 °C and 0.1-100 world-unit bounds.
• Persistence/networking: no save format, persistent identifier, RPC, or network payload changes.
• Runtime: the same managed surface and observed behavior were verified on Mono and IL2CPP.

Closes #237