Add Castlexyz addon

Author: trobukan

.gitmodules

@@ -241,3 +241,6 @@
 [submodule "addons/LuaPlayerYT/module"]
 	path = addons/LuaPlayerYT/module
 	url = https://github.com/antim0118/lpyt-lls-addon
+[submodule "addons/castlexyz/module"]
+	path = addons/castlexyz/module
+	url = https://github.com/trobukan/castlexyz.git

addons/castlexyz/info.json

@@ -0,0 +1,5 @@
+{
+  "$schema": "https://raw.githubusercontent.com/LuaLS/LLS-Addons/main/schemas/addon_info.schema.json",
+  "name": "Castlexyz",
+  "description": "Definitions for the Castlexyz Lua API"
+}