Initial release of gitload.

• Easily download files, folders, or entire repositories from GitHub URLs without cloning the whole repo.
• Supports downloading to custom locations, flattening downloads, and saving as ZIP files.
• Handles private repositories via GitHub token or gh CLI authentication.
• Accepts both file and folder URLs, with direct support for main, branch, or custom paths.
• Designed for quick scaffolding, fetching config/examples, and offline documentation retrieval.
• No git history included; operates via GitHub API, not git protocol.