Adding Mixtral's Codestral, Added Deployment Guide for Cloudflare Pages

[BurhanCantCode]

Changes Made

1. Added Mixtral's Codestral Model

• Added Codestral to the supported models list
• Integrated with existing Mixtral provider configuration
• Updated model selection UI to include the new option

2. Enhanced Deployment Documentation

• Added detailed Cloudflare Pages deployment guide
• Included step-by-step instructions for:
  • Setting up Cloudflare account
  • Configuring environment variables
  • Handling API keys securely
  • Troubleshooting common deployment issues

Testing Done

• Verified Codestral model integration works correctly
• Tested deployment guide steps on a fresh Cloudflare account
• Validated environment variable configuration process

Notes for Reviewers

• Please check if the deployment guide is clear enough for new users
• Verify if Codestral integration follows our existing provider patterns

[leex279]

Hi @BurhanCantCode,
thanks for the PR.

A few things on this:

• Split in multiple PRs, cause it should be one specific Feature per PR, so it also can be reflected correctly in the Release Notes later
• Cloudflare => I dont think thats something for the official docs, cause this needs to be maintained in all coming releases and there are maybe things which change over time. This is not manageable by the core team. I think this is covered quite code by community posts and youtube videos (like one of my videos on this)

@coleam00 => your opinion on these PR(s)?