fix(core): Fix tsconfig resolution and Detox R8 error for RN 0.84

- Use bare specifier in tsconfig extends (`@react-native/typescript-config`
  instead of `@react-native/typescript-config/tsconfig.json`). Node 22
  strictly enforces the package's `exports` field, and ts-jest couldn't
  resolve the direct file path.

- Add proguard `-dontwarn` for `NotThreadSafeBridgeIdleDebugListener`
  which Detox references but was removed in RN 0.84.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: antonis

samples/react-native/android/app/build.gradle

@@ -190,6 +190,7 @@ android {
             signingConfig signingConfigs.debug
             minifyEnabled enableProguardInReleaseBuilds
             proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
+            testProguardFiles "proguard-rules.pro"
             proguardFile "${rootProject.projectDir}/../node_modules/detox/android/detox/proguard-rules-app.pro"
         }
     }

samples/react-native/android/app/proguard-rules.pro

@@ -12,3 +12,6 @@
 # Detox Release tests were failing on missing kotlin.Result
 # It should be covered by node_modules/detox/android/detox/proguard-rules-app.pro but it seems missing
 -keep class kotlin.** { *; }
+
+# Detox references bridge classes removed in RN 0.84
+-dontwarn com.facebook.react.bridge.NotThreadSafeBridgeIdleDebugListener

samples/react-native/tsconfig.json

@@ -1,6 +1,6 @@
 // prettier-ignore
 {
-  "extends": "@react-native/typescript-config/tsconfig.json",
+  "extends": "@react-native/typescript-config",
   "compilerOptions": {
     /* Visit https://aka.ms/tsconfig.json to read more about this file */