refactor: Standardize on 'GitHub Copilot' branding (#296)

* refactor: Standardize on 'GitHub Copilot' branding

- Update all references from 'Github Copilot' to 'GitHub Copilot' (official branding)
- Simplify GitHub Copilot guide reference in README
- Rebuild distribution files to reflect changes
- Ensure consistent branding across documentation and configuration

* fix: add Trae IDE support while maintaining GitHub Copilot branding

tools/installer/lib/ide-setup.js

@@ -66,7 +66,7 @@ class IdeSetup {
       case "gemini":
         return this.setupGeminiCli(installDir, selectedAgent);
       case "github-copilot":
-        return this.setupVsCodeCopilot(installDir, selectedAgent, spinner);
+        return this.setupGitHubCopilot(installDir, selectedAgent, spinner);
       default:
         console.log(chalk.yellow(`\nIDE ${ide} not yet supported`));
         return false;
@@ -566,7 +566,7 @@ class IdeSetup {
     return true;
   }
 
-  async setupVsCodeCopilot(installDir, selectedAgent, spinner = null) {
+  async setupGitHubCopilot(installDir, selectedAgent, spinner = null) {
     await initializeModules();
     
     // Configure VS Code workspace settings first to avoid UI conflicts with loading spinners