move lua libs to /logic/scripting/lua/libs

src/logic/scripting/lua/libs/libentity.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <optional>
+
+#include "frontend/hud.hpp"
+#include "objects/Entities.hpp"
+#include "world/Level.hpp"
+#include "logic/LevelController.hpp"
+#include "api_lua.hpp"
+
+namespace scripting {
+    extern Hud* hud;
+}
+
+inline std::optional<Entity> get_entity(lua::State* L, int idx) {
+    auto id = lua::tointeger(L, idx);
+    auto level = scripting::controller->getLevel();
+    return level->entities->get(id);
+}