chore: align repository name with package

[ngocdevv]

Summary

• align the GitHub repository slug with the published package name: ngocdevv/expo-share-content
• migrate the Docusaurus base URL and all repository links to /expo-share-content/
• add npm repository, homepage, and bugs metadata for the next package release
• point the CocoaPods homepage and landing-page GitHub CTA at the renamed repository

External configuration already completed

• GitHub repository renamed from ngocdevv/React-Native-Share-Content
• local origin updated to git@github.com:ngocdevv/expo-share-content.git
• repository homepage updated to https://ngocdevv.github.io/expo-share-content/
• GitHub Pages site record preserved with build_type: workflow and HTTPS enforcement

Verification

• npm run test: 6 suites, 39/39 tests pass
• npm run lint: pass with zero warnings
• npm run build: pass
• cd docs && npm run typecheck: pass
• cd docs && npm run build: pass with no Docusaurus warnings
• static crawl: 12 pages, 346 internal links, zero old-slug references
• git diff --check: pass

Follow-up outside this PR

The npm Trusted Publisher repository binding must be changed from ngocdevv/React-Native-Share-Content to ngocdevv/expo-share-content before the next OIDC release. npm requires an interactive 2FA re-authentication for this sensitive setting.