feat: Implement provider loader dynamic imports with GitHub URL support

- Add URL detection and parsing utilities for GitHub URLs, local paths, and NPM packages
- Implement git operations for cloning and updating repositories with local caching
- Add automatic update checking mechanism for GitHub repositories
- Update provider-loader.ts to support multiple source types with comprehensive error handling
- Add comprehensive test coverage for all new functionality
- Include complete documentation with usage examples
- Support GitHub URLs: https://github.com/user/repo, user/repo@branch
- Support local paths: ./path, /absolute/path
- Support NPM packages: package-name, @scope/package
- Maintain backward compatibility with existing providers
- Add fallback mechanisms and interface validation

Author: frostebite

src/model/cloud-runner/providers/provider-git-manager.test.ts

@@ -46,7 +46,6 @@ describe('ProviderGitManager', () => {
     jest.clearAllMocks();
   });
 
-
   describe('cloneRepository', () => {
     it('successfully clones a repository', async () => {
       const expectedResult = {