- Introduced CLI commands for server, login, upload, sign, verify, and more using `clap`.
- Updated Dockerfile and docker-compose to default to `server` command on startup.
- Enhanced `test_local.sh` for testing the server and client operations.
- Added multipart support to `reqwest` and new CLI documentation in `README.md`.
- Updated `Cargo.toml` with new dependencies to support CLI and multipart uploads.