feat: complete structured CLI output

- unify human, plain, and JSON CLI output modes

- standardize diagnostics, lifecycle events, colors, quiet, and verbose handling

- preserve argument forwarding and improve CLI help and summaries

- document and release version 0.9.5

src/core/vcs/git.rs

@@ -15,8 +15,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-use std::fs;
-use std::path::Path;
+use std::{fs, path::Path};
 
 /// Initializes a Git repository in the target directory and configures its `.gitignore` file.
 ///