API Key system for Puter.js

[Zac0511]

The way Puter.js currently works is very good (open authentication windows, etc...), but it only works if the user's browser can open popups. If Puter.js is used in a browser which don't support popups (such as browser on consoles), or simply if puter.js is used in something which won't run in a browser (example : a game).

So i thinked it would be useful if a new menu was added to Puter's settings for creating API keys, managing their permissions (use AI, read FS, write FS, etc...), and delete them, and add a Puter.js function that could be something like puter.auth.signInKey(api key) to auth with an API key instead of using an account.

Other ideas for API keys :

• Allow users to set an expiration date to API keys
• Allow users to set a limit to API keys (example : let API have 50 AI uses per month, or revoke API key when limit is reached)