feat: add Bun templates for create-discord-bot (#11348)

* feat: add Bun templates for create-discord-bot

- Add TypeScript Bun template with complete src structure
- Add JavaScript Bun template with complete src structure
- Both templates mirror the Node.js versions with Bun-specific configuration

Closes #11346

* fix: update template and bun template loading

---------

Co-authored-by: almeidx <github@almeidx.dev>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/create-discord-bot/src/helpers/packageManager.ts

@@ -19,6 +19,10 @@ export function resolvePackageManager(): PackageManager {
 		return 'deno';
 	}
 
+	if (process.versions.bun) {
+		return 'bun';
+	}
+
 	// If this is not present, return the default package manager.
 	if (!npmConfigUserAgent) {
 		return DEFAULT_PACKAGE_MANAGER;