feat: use copy-paste instead of api

[ther0bster]

Thanks for your work on aider, it's a truly amazing open-source project!

See #3479

Inpired by aider's copy-paste mode and Roo-Codes's Human Relay feature, I integrated a proof-of-concept --copy-paste-no-api mode into aider.

The --copy-paste-no-api mode allows using aider with a web ui only and without any api.

Why would anyone want to use this?

As already nicely explained in RooVetGit/Roo-Code#1267

• aider works fully without api key
• very useful for using aider at e.g. work where
  • sending code to api / hosting local ollama model is not allowed/possible
  • but using web ui like GitHub copilot is allowed
• cost per token if often cheaper in web ui than in api
• equivalent to aider's --copy-paste mode this should not violate ToS

As this is just a quick proof-of-concept implementation, I appreciate feedback on how such a feature can fit best within aider's architecture. The code has some rough edges, e.g. passing io to Models class.

Also, I'm confident someone will find a better name for this than --copy-paste-no-api.

To test this, check out the PR's branch and run aider with:

aider --copy-paste-no-api --model claude-3-7-sonnet-20250219

Here is a short screen recording demonstrating this feature

aider-copy-paste-no-api-final.mp4

[CLAassistant]

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