Add support for Devstral-2512 (Mistral) and Longcat Flash Thinking (LongCat) models

[JustinReyes28]

I would like to request support for two additional AI models to be integrated into the platform:

1. Devstral-2512
   Model Provider: Mistral
   Model Name: devstral-2512

2. Longcat Flash Thinking
   Model Provider: LongCat
   Model Name: Longcat Flash THinking