Provides a `gitlocal version` command to display the application's version, commit hash, and build date.
Introduces a `Makefile` to automate builds, installations, and tests. The Makefile dynamically extracts version, commit, and date from git tags, commit hashes, and build timestamps, injecting this metadata into the Go binary via `ldflags`.
Updates the `README.md` to document the new command and recommended build process using the Makefile.
Introduces the `gitlocal` command-line tool for managing nested Git repositories.
Includes the following main commands:
- `convert`: Renames `.git` to `.gitlocal`, allowing a parent repository to ignore the converted child repository. Supports recursive scanning and dry-run options. Tracks converted repositories in a global configuration.
- `revert`: Restores `.gitlocal` to `.git`. Includes an option to revert all tracked repositories.
- `status`: Displays a list of all repositories currently tracked by `gitlocal`, showing their path, conversion time, and original remote/branch.
Establishes internal modules for Git operations, configuration management, and recursive repository scanning.
Adds a comprehensive test suite covering core command logic and utility functions.
Initializes Go module and basic project `.gitignore`.
