refactor: route core definitions through content catalog

simulation/definitions/SimulationDefinitions.gd

@@ -30,6 +30,7 @@ static var _profession_list: Array[ProfessionDefinition] = []
 static var _action_map: Dictionary = {}
 static var _profession_map: Dictionary = {}
 static var _profession_id_list: Array[StringName] = []
+static var _catalog_errors: Array[String] = []
 static var _cache_valid := false
 
 
@@ -41,19 +42,19 @@ static func _ensure_cache() -> void:
 	_action_map = {}
 	_profession_map = {}
 	_profession_id_list = []
-
-	for path in ACTION_PATHS:
-		var definition := load(path) as ActionDefinition
-		if definition != null:
-			_action_list.append(definition)
-			_action_map[definition.action_id] = definition
-
-	for path in PROFESSION_PATHS:
-		var definition := load(path) as ProfessionDefinition
-		if definition != null:
-			_profession_list.append(definition)
-			_profession_map[definition.profession_id] = definition
-			_profession_id_list.append(definition.profession_id)
+	_catalog_errors = []
+	var catalog := ContentCatalog.create_core()
+	if not catalog.is_valid():
+		_catalog_errors = catalog.get_errors()
+		_cache_valid = true
+		return
+	_action_list = catalog.get_actions()
+	_profession_list = catalog.get_professions()
+	for definition in _action_list:
+		_action_map[definition.action_id] = definition
+	for definition in _profession_list:
+		_profession_map[definition.profession_id] = definition
+		_profession_id_list.append(definition.profession_id)
 
 	_cache_valid = true
 
@@ -89,7 +90,7 @@ static func get_profession_ids() -> Array[StringName]:
 
 static func validate() -> Array[String]:
 	_ensure_cache()
-	var errors: Array[String] = []
+	var errors: Array[String] = _catalog_errors.duplicate()
 	if _action_list.size() != ACTION_PATHS.size():
 		errors.append("One or more ActionDefinition resources failed to load")
 	if _profession_list.size() != PROFESSION_PATHS.size():