feat: Addressables rules/sync tools, UI fixes, AddressKeys update

- Add AddressableRules.cs: single source of truth for prefix->group and prefix->label rules
- Add AddressableRuleSyncWindow.cs: scan/fix/export-CSV tool (BaseGames > Addressables > Rule Sync)
- AddressableBatchTool.cs: delegate DeriveGroupName to AddressableRules, remove duplicate PrefixGroupMap
- AddressKeys.cs: add Labels constants (Preload, Poolable, Enemy, BGM, SFX, Charms, Config, Weapon)
- Docs/Standards/AddressablesLabelSpec.md: new label naming & assignment spec
- Docs/Standards/AssetFolderSpec.md: update Addressables group strategy section
- SplashScreenController.cs: fix MainMenu loading flow
- BootFlowSetupWizard.cs / SceneScaffoldTools.cs: scene scaffold fixes
- PlayerInputActions: set UI/Point to Pass-Through type
- Persistent.unity: add BootSequencer to auto-load MainMenu on play
- EditorBuildSettings.asset: register scenes for build

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

ProjectSettings/EditorBuildSettings.asset

@@ -8,12 +8,15 @@ EditorBuildSettings:
   - enabled: 0
     path: Assets/Scenes/SampleScene.unity
     guid: 8c9cfa26abfee488c85f1582747f6a02
+  - enabled: 0
+    path: Assets/_Game/Scenes/Persistent.unity
+    guid: 6372e5b8e07d7ae4eb37a184fc8e912d
+  - enabled: 0
+    path: Assets/_Game/Scenes/Testings/MainMenu.unity
+    guid: 2a1ec0c1f9a64054f95911d1cda97f6e
   - enabled: 1
     path: Assets/_Game/Scenes/Testings/TestRoomA.unity
     guid: f11781b557031114087be5fab27f8dd4
-  - enabled: 1
-    path: Assets/_Game/Scenes/Persistent.unity
-    guid: 6372e5b8e07d7ae4eb37a184fc8e912d
   m_configObjects:
     com.unity.addressableassets: {fileID: 11400000, guid: 5afba7e2911543d418af812de1160fb1, type: 2}
     com.unity.input.settings.actions: {fileID: -944628639613478452, guid: 6d0341a640ba64043a8cd70f771b962d, type: 3}