Add 2022.3.0 unitypackage

[timbotimbo2]

Description

There have been several Unity export fixes which never ended up in a unitypackage for over a year.
This PR adds a new package.

Also included bugfixes from #759 (pause/resume) and #894.

Changes included

• Avoid invalid iOS export when current build target is not iOS.
• (Android) Disable absolute ndk path from Unity export. (Unity 2022.3.x and newer)
• (Android) Add missing namespace in unityLibrary build.gradle for Android Gradle plugin (AGP) 8.x.
• (Web) Fix Javascript error on Play and Pause.
• (Android) Fix build error resource style/UnityThemeSelector not found in the example project.
• Use Il2CppCodeGeneration.OptimizeSpeed in Android and iOS release exports.

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore