[Zheng-Yu7463]

Follow-up to hk-modding#164, based on @SFGrenade's hk-beta-branch-unity-6-update at 468f579. This adapts the Unity 6 branch so EnemyHPBar and Benchwarp run on macOS with Hollow Knight 1.5.12620 (Unity 6000.0.61f1), in both native arm64 and Rosetta game processes.

Fixes

• Inline prevention was inverted (MonoMod.Patcher/MonoModder.cs): AggressiveInlining was applied instead of cleared, so patched methods stayed inlined and runtime hooks never observed calls. Both game assemblies now build with PreventInline as intended.
• Legacy hook forwarding across the localization move to TeamCherry.Localization.Language: a [Modding.ForwardedHooks] marker lets HookGenerator retarget On/IL endpoints to the real methods while keeping legacy signatures, including the old LanguageCode enum in parameters and returns. Invalid forwarded facades are rejected at generation time.
• Menu transition NullReferenceException: the preloader now calls PrepareForMenuTransition() to set the private waitForManualLevelStart before LoadSceneAsync("Quit_To_Menu"), fixing a GameManager.SetupHeroRefs crash. The field has to stay private: making it public changes Unity serialization layout and crashes at runtime.
• macOS build and packaging: Assembly-CSharp no longer defaults to a game path or copies in place, stages only OutputFinal, packages both native dylibs per RID, always regenerates HookGen output, fixes Pre/PostPatcher build order, and merges the x86-64 and arm64 natives into universal libraries as part of the build itself. The GitHub Actions macOS job installs lipo before building instead of merging afterwards, so local builds and CI produce the same universal libraries. Previously a local Apple Silicon build silently shipped x86-64-only natives, which made UnitySceneRepacker fail in a native arm64 process and Benchwarp teleports time out.

Validation

• Release and Debug builds: 0 errors. The merged dylibs verify as universal, and their x86-64 slices are byte-identical to the previous x64-only files.
• New Tests/HookGen regression tests (no game files needed): PASS.
• Runtime smoke probe on an isolated game copy, native arm64: 37/37. Satchel 0.9.4-b6ec98, EnemyHPBar 3.1.5 and Benchwarp 3.2.6.1 load without initialization errors; resource decoding, menu construction and bench preload succeed; native detour install/original/dispose works; legacy language hooks fire exactly once per call with enum values preserved and unsubscribe clean.
• Gameplay probe on an isolated game copy, native arm64: 14/14. A real Tutorial_01 Crawler creates an EnemyHPBar and its HP is tracked from 8 to 7; Benchwarp teleports to Town's RestBench marker with the hero active and gameplay resumed.
• The same gameplay probe under Rosetta (x86-64): 14/14.
• Real game launched from Steam (native arm64): UnitySceneRepacker loads (Repacked 1 preload scenes from 1146 to 45 objects) and the modded title screen lists all three mods.

Limitations

• Only Satchel, EnemyHPBar and Benchwarp were validated; save persistence was not exercised. Mods that assume an x86-64 process may still fail on arm64.
• Windows and Linux code paths changed but were not run locally; CI is the check for those.

The changes can be split into smaller PRs if that is preferred for review.

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