feat(runtime): add fire os and vega support

[hyochan]

Summary

• Add Amazon Fire OS Android flavor support and setup documentation.
• Add Vega runtime adapters and generated type/package metadata updates across framework libraries.
• Add Kit-side Amazon receipt handling and related route/schema coverage.

Validation

• git diff --cached --check
• scripts/audit-non-godot-parity.mjs
• packages/docs: bun run typecheck, bun run audit:docs, Prettier check from pre-commit
• packages/google: ./gradlew :openiap:compilePlayDebugKotlin, ./gradlew :openiap:compileHorizonDebugKotlin
• packages/gql: bun test with Bun 1.3.13
• packages/kit: lint, Prettier check, tests, smoke server from pre-commit
• libraries/kmp-iap: ./gradlew :library:compileDebugKotlinAndroid from pre-commit
• Vega VVD: installed App Tester and the Vega smoke app via vda push + vpm install, injected amazon.sdktester.json and app sandbox config, verified getProductData reached the Amazon App Tester purchase sheet, and confirmed Get Item completed with Thank You! Your order is complete.
• Vega VVD follow-up: after the App Tester completion dialog, verify the app returns to the smoke screen and records purchase result / getPurchaseUpdates; the current macOS VVD session disconnected immediately after purchase completion.

Notes

• Flutter analyze was skipped by the pre-commit hook because flutter is not on PATH in this environment.

Summary by CodeRabbit

• New Features

  • Fire OS (Amazon Appstore) support across SDKs, toolchains, and server verification; Vega OS runtime adapter for React Native/Expo; Amazon in-app adapters and verification flows.

• Bug Fixes / Privacy

  • Improved sensitive-key redaction and reduced logging of verification parameters; stricter verification payload validation and platform-consistency checks.

• Documentation

  • New Fire OS and Vega OS setup/runtime guides; updated examples (finishTransaction object form) and release notes.

• Tests

  • Extensive Amazon/Vega unit and integration test coverage.

• Chores

  • CI/release workflow and publishing adjustments; version bumps.