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/providerProfile.ts

@@ -190,6 +190,7 @@ export async function buildLaunchEnv(options: {
     }
 
     delete env.CLAUDE_CODE_USE_OPENAI
+    delete env.CLAUDE_CODE_USE_GITHUB
 
     env.GEMINI_MODEL =
       processEnv.GEMINI_MODEL ||
@@ -224,6 +225,7 @@ export async function buildLaunchEnv(options: {
   }
 
   delete env.CLAUDE_CODE_USE_GEMINI
+  delete env.CLAUDE_CODE_USE_GITHUB
   delete env.GEMINI_API_KEY
   delete env.GEMINI_MODEL
   delete env.GEMINI_BASE_URL