feat: add version argument (#1060)

Co-authored-by: heiko <heiko_was_taken@protonmail.com>

src/tagstudio/main.py

@@ -11,6 +11,7 @@ import traceback
 
 import structlog
 
+from tagstudio.core.constants import VERSION, VERSION_BRANCH
 from tagstudio.qt.ts_qt import QtDriver
 
 logger = structlog.get_logger(__name__)
@@ -54,6 +55,13 @@ def main():
         action="store_true",
         help="Reveals additional internal data useful for debugging.",
     )
+    parser.add_argument(
+        "-v",
+        "--version",
+        action="version",
+        help="Displays TagStudio version information.",
+        version=f"TagStudio v{VERSION} {VERSION_BRANCH}",
+    )
     args = parser.parse_args()
 
     driver = QtDriver(args)