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

src/logic/scripting/lua/libs/libtime.cpp

@@ -0,0 +1,16 @@
+#include "engine.hpp"
+#include "window/Window.hpp"
+#include "api_lua.hpp"
+
+static int l_time_uptime(lua::State* L) {
+    return lua::pushnumber(L, Window::time());
+}
+
+static int l_time_delta(lua::State* L) {
+    return lua::pushnumber(L, scripting::engine->getDelta());
+}
+
+const luaL_Reg timelib[] = {
+    {"uptime", lua::wrap<l_time_uptime>},
+    {"delta", lua::wrap<l_time_delta>},
+    {NULL, NULL}};