[Feature]Mistral : implement thinking tag

[jcommaret]

1. Version :
   VSCode Version: 1.99.3
   Void Version: 1.4.9
   Commit: a711a3e
   Date: 2025-08-20T14:36:17.520Z (5 hrs ago)
   Electron: 34.3.2
   ElectronBuildId: undefined
   Chromium: 132.0.6834.210
   Node.js: 20.18.3
   V8: 13.2.152.41-electron.0
   OS: Darwin arm64 25.0.0

2. Mistral thinking tags are done a bit differently now

{
    "role": "system",
    "content": [
      {
        "type": "text",
        "text": "System prompt, with both instructions and"
      },
      {
        "type": "thinking",
        "thinking": [
          {
            "type": "text",
            "text": "Encapsulated reasoning instructions."
          }
        ]
      }
    ]
  },

https://docs.mistral.ai/capabilities/reasoning/

@andrewpareles : how can we implement this ?

[andrewpareles]

Mistral's API is annoyingly custom for a lot of things. We might need to update our sendLLMMessage.ts file to allow this.

[jcommaret]

fixed by #910