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.

manifest.json

@@ -5,7 +5,7 @@
   "author": "ct",
   "description": "Interactive objects subsystem: JSON-driven scene interactives (hover/click hit areas, highlight effects) with DSL/scenario click actions. Owns InteractiveManager, the interactive definition resolver/factory and the InteractiveEditor data plane.",
   "category": "engine, library",
-  "depends": ["base2d>=1", "interface>=1"],
+  "depends": ["shell2d_base>=1", "ui_base>=1"],
   "sources": [ "src/**/*.cs" ],
   "ui": [],
   "test_suites": [