Update engage-native docs: Expo 55, RN 0.83, R8 minification

[mintlify]

Summary

Syncs repositories/d-sports-engage-native.mdx with d-sports-ecosystem/d-sports-engage-native@fdd4aae.

Trigger repo changes

• Initial commit of the full d-sports-engage-native repo, including R8 minification/deobfuscation enabled for Android release builds.

Docs changes (repositories/d-sports-engage-native.mdx)

• Tech stack versions updated: Expo 54→55, React Native 0.81→0.83, TypeScript 5.9.
• Added Monitoring row (Sentry, OneSignal) and Widgets feature entry.
• New Android builds and R8 section documenting enableMinifyInReleaseBuilds and enableShrinkResourcesInReleaseBuilds config with a warning about testing native modules.
• Getting started expanded with environment variable guidance, production build commands, and type-checking step.
• What changed section updated with version upgrade and R8 notes.