upgrade

   - Upgrade Kotlin from 2.1.0 to 2.3.0 to match
   Gradle 9.4.1's embedded Kotlin
   - Upgrade KSP from 2.1.0-1.0.28 to 2.3.0
   - Upgrade kotlinx-serialization plugin from
   1.9.10 to 2.3.0
   - Upgrade kotlinx-serialization-json from 1.6.0
   to 1.8.1
   - Remove non-existent :desugaring-core from
   build-logic settings (already provided via
   includeBuild)
   - Enable R8 minification and shrinkResources for
    release builds

- Replace deprecated kotlin-android plugin with org.jetbrains.kotlin.android across all modules
- Migrate from BaseExtension to ApplicationExtension/LibraryExtension/CommonExtension for AGP 9.x API compatibility
- Replace deprecated kapt() function with add("kapt", ...) syntax in all build.gradle.kts files
- Rename google-auto-service to google-auto-service-processor in version catalog to fix annotation processor resolution
- Update shadow plugin from com.github.johnrengelman.shadow 8.1.1 to com.gradleup.shadow 9.4.1 with proper configuration
- Add android.builtInKotlin=false and android.newDsl=false to all composite build gradle.properties to disable AGP built-in Kotlin support
- Remove deprecated DefaultWrapperVersionsResources and WrapperVersionsResources from GradleVersionResolver and IDEWrapperGenerator
- Bump build-logic Kotlin JVM target from 11 to 17
- Set android.aapt2FromMavenOverride and org.gradle.java.home in gradle.properties
- Exclude kotlin-android-extensions-runtime from configurations
- Fix SigningConfigPlugin to use plugins.withId() for proper plugin ordering

This reverts commit 2985506.

This reverts commit c3c330c.