Add Unity AI Assistant package + editor settings migration

Adds com.unity.ai.assistant 2.12.0-pre.2 (+ transitive com.unity.ai.inference 2.6.1 and the com.unity.dt.app-ui EditorBuildSettings config) to the package manifest/lockfile, plus the package's ProjectSettings/Packages/com.unity.ai.assistant/Settings.json. ProjectSettings.asset migrated serializedVersion 28->29 (new iOS thermal-FPS / Android system-bar fields) by the editor. Editor/package tooling only; committed separately from the class-switch dev tool to keep concerns isolated.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

ProjectSettings/EditorBuildSettings.asset

@@ -18,4 +18,5 @@ EditorBuildSettings:
     path: Assets/Scenes/SampleScene.unity
     guid: 99c9720ab356a0642a771bea13969a05
   m_configObjects:
+    com.unity.dt.app-ui: {fileID: 11400000, guid: 1b1c20d82303e4b5781c3ef50ac1449f, type: 2}
     com.unity.input.settings.actions: {fileID: -944628639613478452, guid: 5aa62f6ed584c43b791e76f2fd31820f, type: 3}

ProjectSettings/Packages/com.unity.ai.assistant/Settings.json

@@ -0,0 +1,8 @@
+{
+    "CustomInstructionsGUID": "",
+    "CheckpointEnabled": false,
+    "GitInstanceTypeValue": 0,
+    "CustomGitPath": "",
+    "CheckpointRetentionWeeks": 2,
+    "PlanExecutionPromptDismissed": false
+}

ProjectSettings/ProjectSettings.asset

@@ -3,7 +3,7 @@
 --- !u!129 &1
 PlayerSettings:
   m_ObjectHideFlags: 0
-  serializedVersion: 28
+  serializedVersion: 29
   productGUID: 8651c8c52439f4592b5a1d6b6116c979
   AndroidProfiler: 0
   AndroidFilterTouchesWhenObscured: 0
@@ -65,10 +65,15 @@ PlayerSettings:
   useOSAutorotation: 1
   use32BitDisplayBuffer: 1
   preserveFramebufferAlpha: 0
+  adjustIOSFPSUsingThermalState: 1
+  thermalStateSeriousIOSFPS: 30
+  thermalStateCriticalIOSFPS: 15
   disableDepthAndStencilBuffers: 0
   androidStartInFullscreen: 1
   androidRenderOutsideSafeArea: 1
   androidUseSwappy: 0
+  androidRequestedVisibleInsets: 0
+  androidSystemBarsBehavior: 2
   androidDisplayOptions: 1
   androidBlitType: 0
   androidResizeableActivity: 1
@@ -200,6 +205,7 @@ PlayerSettings:
   tvOSTargetOSVersionString: 15.0
   VisionOSSdkVersion: 0
   VisionOSTargetOSVersionString: 1.0
+  xcodeProjectType: 0
   uIPrerenderedIcon: 0
   uIRequiresPersistentWiFi: 0
   uIRequiresFullScreen: 1
@@ -267,7 +273,6 @@ PlayerSettings:
   useCustomGradleSettingsTemplate: 0
   useCustomProguardFile: 0
   AndroidTargetArchitectures: 2
-  AndroidAllowedArchitectures: -1
   AndroidSplashScreenScale: 0
   androidSplashScreen: {fileID: 0}
   AndroidKeystoreName: 
@@ -537,7 +542,6 @@ PlayerSettings:
   - m_BuildTarget: AndroidPlayer
     m_APIs: 150000000b000000
     m_Automatic: 1
-  m_BuildTargetVRSettings: []
   m_DefaultShaderChunkSizeInMB: 16
   m_DefaultShaderChunkCount: 0
   openGLRequireES31: 0
@@ -719,6 +723,8 @@ PlayerSettings:
   switchMicroSleepForYieldTime: 25
   switchRamDiskSpaceSize: 12
   switchUpgradedPlayerSettingsToNMETA: 0
+  switchCaStoreSource: 0
+  switchCaStoreFilePath: 
   ps4NPAgeRating: 12
   ps4NPTitleSecret: 
   ps4NPTrophyPackPath: 
@@ -828,7 +834,7 @@ PlayerSettings:
   webWasm2023: 0
   webEnableSubmoduleStrippingCompatibility: 0
   scriptingDefineSymbols:
-    Standalone: UNITY_BURST_EXPERIMENTAL_ATOMIC_INTRINSICS
+    Standalone: UNITY_BURST_EXPERIMENTAL_ATOMIC_INTRINSICS;SENTIS_ANALYTICS_ENABLED
   additionalCompilerArguments: {}
   platformArchitecture: {}
   scriptingBackend:
@@ -836,6 +842,7 @@ PlayerSettings:
     Standalone: 1
   il2cppCompilerConfiguration: {}
   il2cppCodeGeneration: {}
+  il2cppLTOMode: {}
   il2cppStacktraceInformation: {}
   managedStrippingLevel: {}
   incrementalIl2cppBuild: {}
@@ -905,7 +912,6 @@ PlayerSettings:
   XboxOneXTitleMemory: 8
   XboxOneOverrideIdentityName: 
   XboxOneOverrideIdentityPublisher: 
-  vrEditorSettings: {}
   cloudServicesEnabled: {}
   luminIcon:
     m_Name: