Comfy-Org/ComfyUI-Manager ? reverse-engineered prompt

Build me a ComfyUI extension that adds a Manager button to the main interface and makes it much easier to handle add ons.

I want a simple place where users can browse custom nodes and models, then install, remove, enable, disable, and update them without having to dig through folders manually. It should also show useful info about nodes, help users find what they need, and include a hub or directory style view for available extensions. Make it feel like a built in management tool for ComfyUI, not a separate app.

Please include a clean dialog for browsing items, installation status, and any warnings about conflicts or missing info. It should work well for both normal installs and portable installs, and support updating its data from local or online sources when possible. If there are current docs or the official ComfyUI setup details you need, look them up online first.