base44/cli ? reverse-engineered prompt

Build me a command line tool in TypeScript for Base44 that helps people manage apps from the terminal.

I want it to let me log in, create a new project from a template, link an existing local project to a Base44 app, and then sync or deploy things like entities, functions, agents, connectors, secrets, and site files. It should also have a few handy sandbox commands so I can list files, read and write files, edit text, search, run commands, and save checkpoints in a remote app sandbox. Add commands to open the dashboard, open the published site, show my account, and log out.

Please make the CLI friendly and easy to use, with clear help output and a --json mode that returns clean machine readable results for automation. Assume Node 20.19 or newer, and keep it polished like a real published tool. If you need to look up current Base44 docs online, do that.