Introduce `panel-github-repository` in the configuration to allow specifying a custom repository for management panel assets. Update dependency versions and enhance asset URL resolution logic to support overrides.
- Added `GitTokenStore` to handle token storage and metadata using Git as a backing storage.
- Implemented methods for initialization, save, retrieval, listing, and deletion of auth files.
- Updated `go.mod` and `go.sum` to include new dependencies for Git integration.
- Integrated support for Git-backed configuration via `GitTokenStore`.
- Updated server logic to clone, initialize, and manage configurations from Git repositories.
- Added helper functions for verifying and synchronizing configuration files.
- Improved error handling and contextual logging for Git operations.
- Modified Dockerfile to include `config.example.yaml` for initial setup.
- Added `gitCommitter` interface to handle Git-based commit and push operations.
- Configured `Watcher` to detect and leverage Git-backed token stores.
- Implemented `commitConfigAsync` and `commitAuthAsync` methods for asynchronous change synchronization.
- Enhanced `GitTokenStore` with `CommitPaths` method to support selective file commits.
- Introduced synchronization with `sync.Mutex` to ensure thread safety.
- Added logic to skip update checks if the last check was performed within the 3-hour interval.
- Introduced `proxyURL` parameter for `EnsureLatestManagementHTML` to enable proxy configuration.
- Refactored HTTP client initialization with new `newHTTPClient` to support proxy-aware requests.
- Updated asset download and fetch logic to utilize the proxy-aware HTTP client.
- Adjusted `server.go` to pass `cfg.ProxyURL` for management asset synchronization calls.
- Introduced `EnsureLatestManagementHTML` to sync `management.html` asset from the latest GitHub release.
- Added config option `DisableControlPanel` to toggle control panel functionality.
- Serve management control panel via `/management.html` endpoint, with automatic download and update mechanism.
- Updated `.gitignore` to include `static/*` directory for control panel assets.
