[Feature] Add Firebase Remote Config localization

[Velord]

Summary

• replaces Compose Res.string usage with the AppString API backed by bundled core/core-resource/src/commonMain/composeResources/files/localization.json
• keeps localization.json as the bundled localization document and generates only type-safe AppString.xxx keys; no generated default translation roster is maintained
• models supported language choices with LanguagePreference enum values (default, en, es) and keeps the resolved active language separate in LocalizationState
• uses languageRoster consistently in the localization schema and typed LocalizationStringMap values in the model
• keeps parsing, validation, Remote Config access, and error reporting in :data:localization, with orchestration in LocalizationGateway
• uses Firebase-KMP-Kit Remote Config and Crashlytics from commonMain; platform code is limited to locale/Firebase initialization where required
• reports Remote Config/parsing failures instead of silently discarding them, while retaining bundled/activated localization when remote refresh fails
• initializes localization through one InitializeLocalizationUC; initialization publishes the available document and performs the startup Remote Config refresh
• fails fast when required runtime localization state, supported languages, or localization keys are missing; Compose previews use inspection-only key rendering without a duplicate translation source
• keeps QA on the Develop application ID/Firebase client and changes only the visible app name to ComposeScreenExample QA
• keeps existing Android framework strings.xml resources separate; this PR does not generate Android strings.xml from the localization JSON
• validates the FirebaseKit Android manifest path with :app:android:processDevelopDebugMainManifest and verifies Develop/QA/Stage/Production compilation plus Konsist/detekt

FirebaseKit Android namespace

Firebase-KMP-Kit 0.4.0 publishes its Android library modules with the shared com.firebasekit namespace. The project disables AGP unique-package-name validation for this dependency while retaining Firebase-KMP-Kit as the KMP Remote Config implementation. CI runs Android manifest processing to catch regressions in this integration.

Validation

Final validation is running on the current single-commit PR head. The workflow checks localization schema/publishing validation, QA reuse of the Develop Firebase client, localization/Desktop tests, Android manifest processing, all application environments, Konsist, and detekt.

The PR is maintained as exactly one commit.