chore: Upgrade react-native-safe-area-context to 5.8.0

[mrousavy]

Summary

• Upgrade the example app's react-native-safe-area-context dependency to ^5.8.0.
• Refresh bun.lock and example/ios/Podfile.lock so the iOS pods resolve react-native-safe-area-context 5.8.0.
• CocoaPods also corrected stale Yoga and Podfile checksums while updating the lockfile; no Podfile or Yoga version change is included.

Notes

• The 5.8.0 Android pod/package metadata removes the manifest namespace warning seen on 5.6.1.
• Android still emits React Native API deprecation warnings from safe-area internals; those are upstream compatibility warnings and not required for this bump.

Validation

• bun install
• rbenv exec bundle exec pod update react-native-safe-area-context hermes-engine --no-repo-update
• rbenv exec bundle exec pod install
• bun typecheck
• bun lint-ci
• bun run test
• JAVA_HOME=/opt/homebrew/opt/openjdk@17/libexec/openjdk.jdk/Contents/Home ./gradlew assembleDebug --no-daemon --build-cache
• xcodebuild CC=clang CPLUSPLUS=clang++ LD=clang LDPLUSPLUS=clang++ -derivedDataPath build -UseModernBuildSystem=YES -workspace MmkvExample.xcworkspace -scheme MmkvExample -sdk iphonesimulator -configuration Debug -destination 'generic/platform=iOS Simulator' build CODE_SIGNING_ALLOWED=NO
• git diff --check