Convert from npm to pnpm

[bhouston]

Convert from npm to pnpm

Background

This project currently uses npm as its package manager. Converting to pnpm would provide several benefits:

• Faster installation times
• Disk space efficiency through content-addressable storage
• Strict dependency management preventing phantom dependencies
• Better monorepo support if needed in the future

Proposed Changes

• Add pnpm-lock.yaml
• Remove package-lock.json
• Update documentation to reference pnpm instead of npm/yarn
• Add pnpm-specific configuration files if needed

Implementation Details

The conversion should be straightforward:

1. Install pnpm globally
2. Remove node_modules and package-lock.json
3. Run pnpm install to generate pnpm-lock.yaml
4. Update README.md and other docs to use pnpm commands
5. Verify that the application builds and runs correctly with pnpm

Impact

This change is expected to have minimal impact on the development workflow while providing the benefits mentioned above.