Modernize provider support

src/cmdforge/config.py

@@ -75,7 +75,11 @@ class Config:
 
 def get_config_dir() -> Path:
     """Get the config directory, creating it if needed."""
-    CONFIG_DIR.mkdir(parents=True, exist_ok=True)
+    CONFIG_DIR.mkdir(parents=True, exist_ok=True, mode=0o700)
+    try:
+        CONFIG_DIR.chmod(0o700)
+    except OSError:
+        pass
     return CONFIG_DIR
 
 
@@ -101,6 +105,10 @@ def save_config(config: Config) -> Path:
     """Save configuration to disk."""
     config_path = get_config_dir() / "config.yaml"
     config_path.write_text(yaml.dump(config.to_dict(), default_flow_style=False, sort_keys=False))
+    try:
+        config_path.chmod(0o600)
+    except OSError:
+        pass
     return config_path