feat: Support ConfigManager overrides without specifying set_value

No longer requires the `set_value` parameter.

Simplifies usage whenever you want to allow environment variables to take precedence over the config database and you don't have any value to set.

Previously, you had to manually pass `None` for that scenario. Now, the `None` is implicit if the final parameter is omitted.

Author: Arcitec

comfy_cli/config_manager.py

@@ -43,7 +43,7 @@ def get(self, key):
         """
         return self.config["DEFAULT"].get(key, None)  # Returns None if the key does not exist
 
-    def get_or_override(self, env_key: str, config_key: str, set_value: Optional[str]) -> str | None:
+    def get_or_override(self, env_key: str, config_key: str, set_value: Optional[str] = None) -> str | None:
         """
         Resolves and conditionally stores a config value.