refactor(scripts): migrate scripts from JavaScript to TypeScript

[Akanshagore]

Summary

• migrate deployment and utility scripts from JavaScript to TypeScript
• update package.json and GitHub Actions references
• add TypeScript type annotations
• verify migrated scripts with tsc

Validation

• tsc --noEmit --skipLibCheck passed
• lint-staged passed
• git diff --cached --check passed
• start, start:cn, and start:sg verified

[Akanshagore]

PR is ready for review. Checks are awaiting maintainer approval.

[Akanshagore]

Hi maintainers, PR #2237 is ready for review. The TypeScript migration has been validated with tsc --noEmit --skipLibCheck, lint-staged, and the affected start commands. The workflows are currently awaiting maintainer approval. Could someone please review and approve the workflows when available? Thank you!