Bump all packages to v0.8.0 to publish the AppFunctions alpha09
upgrade (#23). Downstream Android hosts need AGP 9.1.0+, Gradle
9.3.1+, compileSdk 37, and the android.newDsl=false /
android.builtInKotlin=false shims in gradle.properties. Regenerate
Kotlin output with `dart run app_intents_codegen:generate_kotlin`
after upgrading.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>