Improves the `version` command to automatically extract build details (version, commit, date) from Go's `debug.ReadBuildInfo` when `ldflags` are not provided.
This allows users installing via `go install` to receive accurate version information without requiring a Makefile or explicit build flags. Updates the README to reflect this new capability.
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.
