Add "le chat" by mistral.ai

[dsteppeler]

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Problem Description

Currently "le chat" (an european alternative to chatGPT by mistral.ai) is missing on the platform.

Proposed Solution

Add https://chat.mistral.ai/chat

Alternatives Considered

Of course you can also install the site as a “custom website”. But I believe that the tool should be included in the standard list.

Additional Information

No response