feat: Add dynamic provider loader with improved error handling

- Create provider-loader.ts with function-based dynamic import functionality
- Update CloudRunner.setupSelectedBuildPlatform to use dynamic loader for unknown providers
- Add comprehensive error handling for missing packages and interface validation
- Include test coverage for successful loading and error scenarios
- Maintain backward compatibility with existing built-in providers
- Add ProviderLoader class wrapper for backward compatibility
- Support both built-in providers (via switch) and external providers (via dynamic import)

.cursor/settings.json

@@ -0,0 +1,18 @@
+{
+    "files.autoSave": "on",
+    "files.autoSaveWhen": "on",
+    "files.autoSaveDelay": 1000,
+  
+    "editor.formatOnSave": false,
+    "editor.formatOnPaste": false,
+    "editor.formatOnType": false,
+  
+    "editor.codeActionsOnSave": {},
+  
+    "git.autorefresh": false,
+    "git.confirmSync": false,
+    "git.autofetch": false,
+  
+    "editor.defaultFormatter": null
+  }
+