fix: JSON schema issue with gemini tool calls

[monotykamary]

Description

Fixes tool calling error that happens when using Gemini. Not actually sure if it's because of MCP servers, but at least now it works.

Checklist

• Fixed and added JSON schema cleaning for processing tools with Gemini

Screenshots

Testing instructions

Select any Gemini model and enable tools. Prompt it in such a way that it will invoke the tool and see the results.

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[RomneyDa]

Note, have pulled branch and tested, works great.
Will merge today,

[sestinj]

Hi @monotykamary, yesterday we shared some updates with our contributors about how we're aiming to improve the contribution process. Part of this included the addition of a Contributor License Agreement (CLA) to protect both contributors and the project. We're reaching out to ask that previous contributors sign it.

Could you please take a moment to sign, or if you have any questions send me a message? (either here or nate@continue.dev would work)

To do so, you just need to post a comment below with the following text:

I have read the CLA Document and I hereby sign the CLA

❤️ Thank you for the work you've done on Continue, and let me know if you have any suggestions on how we can make the project even better!

[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[monotykamary]

I have read the CLA Document and I hereby sign the CLA