Mod naming rule and engine UI in engine mods

Mods are renamed by role (shell2d_base, menu_base, ui_base, live2d_base,
editor_tools, cthangover_story, cthangover_murakami, cthangover_party) and
every reference follows. Engine UI prefabs (dialog, answers, message, game
menu, inventory, map, skills) and their panel entries moved out of the story
mod into the subsystem mods; the card_novel and vn_starter_novel collections
are removed.

src/BaseMenuInitializer.cs

@@ -17,7 +17,7 @@ namespace Cthangover.BaseMenu
     /// </summary>
     public class BaseMenuInitializer : IModInitializer
     {
-        private const string ModId = "base_menu";
+        private const string ModId = "menu_base";
 
         public void OnModLoaded(string modId)
         {