Moved and refactored server-related modules from stream-gears to biliup-cli, including API endpoints, configuration, core logic, and infrastructure. Replaced usage of anyhow with error-stack and custom AppError/AppResult types throughout the codebase. Updated dependencies in Cargo.toml and Cargo.lock, and adjusted code to use new error handling and module paths. Removed obsolete modules and files from stream-gears, and updated README and workspace version.