Align SkyHook event layout and enums; fix time/label mapping; add READMEs

[2228293026]

Motivation

• Ensure the mod's SkyHook compatibility layer exactly matches the in-game SkyHookEvent layout and types to avoid mismatches when marshalling or comparing events.
• Remove ambiguity by qualifying enum usages so the async input consumer references the engine SkyHook enums unambiguously.
• Provide user and developer documentation with English and Chinese README files.

Description

• Replace local EventType/KeyLabel usages with global::SkyHook.EventType and global::SkyHook.KeyLabel and qualify enum comparisons in AsyncInputManager to avoid ambiguous references.
• Redefine SkyHookEvent as StructLayout(LayoutKind.Explicit) with FieldOffset annotations to match the game structure and add GetTimeInTicks plus a corrected time conversion routine in ConvertTicksToSkyHookTime.
• Replace the previous GetKeyLabel implementation with a compact switch expression that maps key codes to global::SkyHook.KeyLabel values and adjust several label names to match the SkyHook API (Enter, ArrowLeft/ArrowUp/ArrowRight/ArrowDown, Unknown, etc.).
• Add documentation files README.md and README.en.md describing features, configuration and build notes for the project.

Testing

• Built the project (Release) with the normal .NET build process (msbuild / Visual Studio) and confirmed the compilation succeeds.
• No automated unit tests were present or run as part of this change.

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Codex Task