Don't crash if there is no plugin directory

src/sshare/config_directory.py

@@ -25,9 +25,12 @@ def default_config():
     return _LOCATION / "config.toml"
 
 def plugins():
+    if (_LOCATION / "plugins").is_dir():
         return [
             path for
             path in
             (_LOCATION / "plugins").iterdir()
             if path.is_file() and path.suffix == ".py"
         ]
+    else:
+        return []