feat: add dynamic chalk loader for ESM compatibility

[wearedood]

Summary

Fixes ESM import error caused by chalk being ESM-only in version 5.x. This PR adds a dynamic chalk loader with fallback shim to maintain compatibility while supporting the latest chalk version.

Changes Made

• Added src/utils/getChalk.ts: Dynamic loader that uses import() to load ESM-only chalk with graceful fallback
• Updated src/index.ts: Modified CLI entrypoint to use async IIFE pattern with the getChalk helper
• Maintained backward compatibility: All existing chalk styling functions work as expected

Technical Details

• Uses dynamic import() to handle ESM-only chalk package
• Provides fallback shim with common chalk methods (red, green, yellow, blue, etc.)
• Proxy-based chaining support for complex styling like chalk.green.bold()
• Minimal risk approach: only modified CLI entrypoint, no changes to library modules

Testing

• ✅ npm run build - TypeScript compilation successful
• ✅ npm run lint - ESLint passes
• ✅ npm test - All tests pass
• ✅ node dist/index.js --help - CLI works correctly
• ✅ npm pack - Package creation successful
• ✅ No ESM import errors

Closes

#358