Replace HuggingChat with HuggingFace Widget Provider

feat: Implement OpenCode Terminal Portal

feat: update existing files for provider toggle and proxy system

Add Microsoft Copilot provider with CAPTCHA support

Update all model names with provider prefixes and add 100+ HuggingChat models

Update HuggingChat with login and prefixed model names

Replace Copilot with HuggingChat provider

Add Microsoft Copilot provider - Browser-based provider using Playwright - Integrated into engine and config - Added test script and documentation

feat: OpenAI-compatible API with token auth and admin management

fix: rename gemini-1.5-pro to gemini-3-flash, clean response artifacts

fix: register gemini provider in config and engine

Initial commit