Update PersistentRotation for KSP 1.12.5

[Sean-Kenneth-Doherty]

Summary

• add the missing UnityEngine.AnimationModule project reference needed to build against KSP 1.12.5
• bump the AVC metadata to 1.8.8 and KSP 1.12.5 / max 1.12.99
• align the assembly version and tracked plugin DLL with the 1.8.8 build

Validation

• Checked repository contribution surface: no CONTRIBUTING, CODE_OF_CONDUCT, PR template, or .github workflow docs were present.
• Checked open PRs first: fixes, need to check #41 and Linuxgurugamer branch #42 are older linuxgurugamer branches with larger toolbar/localization/project changes. This PR is intentionally narrow and does not try to replace that work.
• python -m json.tool GameData/PersistentRotation/PersistentRotation.version
• xbuild /p:Configuration=Release /p:ReferencePath="/home/sean/.local/share/Steam/steamapps/common/Kerbal Space Program/KSP_Data/Managed" PersistentRotation.sln
  • Before adding UnityEngine.AnimationModule, the KSP 1.12.5 build failed on Animator being defined in an unreferenced assembly.
  • After the project reference update, the build succeeded with 0 warnings and 0 errors.
• monodis --assembly GameData/PersistentRotation/Plugins/PersistentRotation.dll
  • Generated assembly version reports 1.8.8.0.

[Sean-Kenneth-Doherty]

Closing this under the stricter review bar: this is mostly KSP 1.12.5 metadata/build-reference maintenance without a concrete user-facing issue, maintainer release request, or runtime proof. I do not want to spend maintainer review time on it as-is.