Core: Allows Meta.yaml to add triggers to individual yaml's categories. (#3556)

* Initial commit

* Shifted added code to the appropriate indentation.
Re-wrote for statement in proper python style.

* Update Generate.py

Co-authored-by: qwint <qwint.42@gmail.com>

* change to an elif to avoid unnecessary nesting

---------

Co-authored-by: qwint <qwint.42@gmail.com>
Co-authored-by: Benny D <78334662+benny-dreamly@users.noreply.github.com>

Generate.py

@@ -189,6 +189,11 @@ def main(args=None) -> tuple[argparse.Namespace, int]:
                                         yaml[category][key] = option
                             elif category_name not in yaml:
                                 logging.warning(f"Meta: Category {category_name} is not present in {path}.")
+                            elif key == "triggers":
+                                if "triggers" not in yaml[category_name]:
+                                    yaml[category_name][key] = []
+                                for trigger in option:
+                                    yaml[category_name][key].append(trigger)
                             else:
                                 yaml[category_name][key] = option
 
@@ -385,6 +390,8 @@ def roll_meta_option(option_key, game: str, category_dict: dict) -> Any:
             if options[option_key].supports_weighting:
                 return get_choice(option_key, category_dict)
             return category_dict[option_key]
+        if option_key == "triggers":
+            return category_dict[option_key]
     raise Options.OptionError(f"Error generating meta option {option_key} for {game}.")