message: Allow to use system-installed liblua
diff: +find_package(Lua)
  +if(LUA_FOUND)
  + add_library(lua INTERFACE)
  + target_include_directories(lua INTERFACE ${LUA_INCLUDE_DIR})
  + target_link_libraries(lua INTERFACE ${LUA_LIBRARIES})
  +else()
  set(LUA_DIR lua-5.4.0)
  add_library(lua
  @@ -40,3 +46,4 @@ add_library(lua
  target_include_directories(lua INTERFACE
  ${CMAKE_CURRENT_SOURCE_DIR}/${LUA_DIR}/src
  )
  +endif()
  \ No newline at end of file
  