modules: implement module-lua-scripting

a module that allows loading and executing Lua
scripts from a configured directory

modules/module-lua-scripting/engine.h

@@ -0,0 +1,22 @@
+/* WirePlumber
+ *
+ * Copyright © 2020 Collabora Ltd.
+ *    @author George Kiagiadakis <george.kiagiadakis@collabora.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef __WIREPLUMBER_LUA_SCRIPTING_ENGINE_H__
+#define __WIREPLUMBER_LUA_SCRIPTING_ENGINE_H__
+
+#include <wp/wp.h>
+#include <wplua/wplua.h>
+
+G_BEGIN_DECLS
+
+#define WP_TYPE_LUA_SCRIPTING_ENGINE \
+    (wp_lua_scripting_engine_get_type ())
+
+G_END_DECLS
+
+#endif