Add networked crab gathering prototype

gathering/gatherable_catalog.gd

@@ -0,0 +1,23 @@
+class_name GatherableCatalog
+extends Resource
+
+const GatherableDataType = preload("res://gathering/gatherable_data.gd")
+
+@export var entries: Array[GatherableDataType] = []
+
+
+func get_entry(type_id: StringName) -> GatherableDataType:
+	if type_id.is_empty():
+		return null
+	for entry: GatherableDataType in entries:
+		if entry != null and entry.type_id == type_id:
+			return entry
+	return null
+
+
+func get_available_entries() -> Array[GatherableDataType]:
+	var available: Array[GatherableDataType] = []
+	for entry: GatherableDataType in entries:
+		if entry != null and entry.is_available():
+			available.append(entry)
+	return available