feat: add support for GitHub Models provider

- Introduced environment variable CLAUDE_CODE_USE_GITHUB to enable GitHub Models.
- Added checks for GITHUB_TOKEN or GH_TOKEN for authentication.
- Updated base URL handling to include GitHub Models default.
- Enhanced provider detection and error handling for GitHub Models.
- Updated relevant functions and components to accommodate the new provider.

src/utils/swarm/spawnUtils.ts

@@ -99,6 +99,18 @@ const TEAMMATE_ENV_VARS = [
   'CLAUDE_CODE_USE_BEDROCK',
   'CLAUDE_CODE_USE_VERTEX',
   'CLAUDE_CODE_USE_FOUNDRY',
+  'CLAUDE_CODE_USE_GITHUB',
+  'CLAUDE_CODE_USE_GEMINI',
+  'CLAUDE_CODE_USE_OPENAI',
+  'GITHUB_TOKEN',
+  'GH_TOKEN',
+  'OPENAI_API_KEY',
+  'OPENAI_BASE_URL',
+  'OPENAI_MODEL',
+  'GEMINI_API_KEY',
+  'GEMINI_BASE_URL',
+  'GEMINI_MODEL',
+  'GOOGLE_API_KEY',
   // Custom API endpoint
   'ANTHROPIC_BASE_URL',
   // Config directory override