- Implement NewGiteaClient() that discovers Gitea endpoint from ConfigMap
- Create Gitea SDK client with admin authentication
- Add Gitea SDK dependency to go.mod

- Define RepositoryProvider interface for git server operations
- Allows switching between Gitea/GitHub/GitLab without test code changes
- GiteaClient will implement this interface

- Implement CreateUser() for creating users with specific credentials
- Implement DeleteUser() for cleanup
- Implement CreateRandomUser() for test isolation
- GiteaClient now partially implements RepositoryProvider interface

- Implement CreateRepo() for creating repositories
- Implement DeleteRepo() for cleanup
- Implement CreateRandomRepo() for test isolation
- Build and return repository URLs automatically

- Implement CreateAccessToken() for generating user tokens
- Support authentication for private repositories
- GiteaClient now fully implements RepositoryProvider interface

- Add buildAuthURL() for embedding credentials in git URLs
- Add InitializeRepoWithFunction() for setting up function repos
- Add CommitAndPush() for flexible commit/push with proper error handling
- Helpers simplify test code and promote reusability

- Add repoProvider variable using RepositoryProvider interface
- Initialize with GiteaClient in BeforeSuite
- Verify provider is not nil before tests run
- Interface allows easy switching to other providers

- Replace GitHub cloning with RepositoryProvider workflow in BeforeEach
- Use InitializeRepoWithFunction() helper for repo setup
- Update Function specs to use repository provider URLs
- Add proper cleanup of repository resources in AfterEach
- Tests now isolated and independent of external GitHub
- Keep abstraction by using generic terminology

- Update RepositoryProvider interface to return cleanup functions
- Implement cleanup functions in CreateUser, CreateRepo, etc.
- Use Ginkgo's DeferCleanup for automatic cleanup in tests
- Simplify AfterEach blocks to only handle failure logging
- Much cleaner and less error-prone test code

- Update helper functions to accept and use repoURL parameter
- Replace GitHub URLs with RepositoryProvider workflow in setup functions
- Track repoURLs alongside namespaces for all tests
- Use DeferCleanup for automatic resource cleanup
- Tests now use in-cluster repository provider for all git operations
- Remove unused rand import

- Define TestNamespace struct with Name and RepoURL fields
- Replace separate namespace and repoURL slices with single slice
- Update all functions to accept/return TestNamespace
- Prevents misalignment of parallel slices
- Much safer and cleaner API

- Comprehensive guide for using RepositoryProvider in tests
- Document test patterns and helper methods
- Explain DeferCleanup pattern for automatic cleanup
- Add troubleshooting section
- Describe implementation details and architecture
- Update README with Gitea test information

Fixes multiple issues preventing e2e tests from running with in-cluster
Gitea instead of external GitHub:

- Set MustChangePassword to false when creating users to prevent auth errors
- Use AdminCreateRepo to create repos under correct user account
- Rewrite function initialization to avoid git/func init conflicts
- Add git user configuration for commits
- Use main branch instead of master for modern git compatibility
- Improve error messages by using utils.Run for all git commands
- Add function code to "not yet deployed" test scenario

In CI environments, git may not have a default branch name configured,
causing 'git init' to create a branch with a different name (e.g., master).
This causes the subsequent 'git push -u origin main' to fail with
'src refspec main does not match any'.

Use 'git init -b main' to explicitly create the main branch, ensuring
consistent behavior across all environments.