Fix version detection to use importlib.metadata for installed packages

Author: Matars

src/gitfetch/__init__.py

@@ -7,7 +7,15 @@
 
 
 def _get_version() -> str:
-    """Get version from pyproject.toml."""
+    """Get version from package metadata or pyproject.toml."""
+    try:
+        # Try to get version from package metadata
+        from importlib import metadata
+        return metadata.version("gitfetch")
+    except (ImportError, metadata.PackageNotFoundError):
+        pass
+    
+    # Fallback: try to read from pyproject.toml (works in development)
     pyproject_path = Path(__file__).parent.parent.parent / "pyproject.toml"
     try:
         with open(pyproject_path, "r", encoding="utf-8") as f: