added typescript implementation

[NahumOchoa]

Implement TypeScript & Jest Tests

This PR refactors the codebase to use TypeScript for improved type safety and adds unit tests using Jest to ensure functionality and prevent regressions.

Key Changes:

• Migrated source code (src/index.ts) to TypeScript with strict settings (tsconfig.json).
• Added Jest and ts-jest, configuring them (jest.config.ts) for TypeScript and ES Modules.
• Implemented unit tests for tools/list and tools/call (add method), covering core logic and edge cases.
• Created test utilities (__tests__/test-utils.ts) for cleaner test mocks.
• Updated package.json scripts (start, deploy, test) to include TypeScript compilation and necessary Node options for testing.
• Updated README.md with current build, run, and test instructions.

Benefits:

• Enhanced code robustness and maintainability.
• Increased confidence through automated testing.
• Improved developer experience.

To Test:

npm install
npm test