Migrate to TypeScript

[knowledgecode]

Summary

• Migrate codebase from JavaScript to TypeScript
• Add strict type checking and ESLint configuration
• Replace Karma with Vitest for browser testing
• Add generics support to messaging methods
• Update documentation with TypeScript examples

Changes

TypeScript Migration

• Convert all source files to TypeScript with strict mode
• Add generic type parameters to req(), subscribe(), and bind() methods

Testing

• Replace Karma with Vitest + Playwright for browser testing

Documentation

• Update README with TypeScript code examples
• Update package.json description and keywords

Test Results

• ✅ All 28 tests passing
• ✅ TypeScript compilation successful
• ✅ ESLint checks passing