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.

test_suites/interactives/manifest.json

@@ -2,5 +2,5 @@
   "name": "Interactives test",
   "description": "Integration test of the interactive object system: the scenario command interactive_add places a clickable lamp on interactives_test; the driver checks the definition, hover DSL and that a click runs the onClick scenario. Mounted by --itest=interactives.",
   "sources": ["src/*.cs"],
-  "depends": ["visual_novel_core>=1", "dialog_base>=1"]
+  "depends": ["cthangover_story>=1", "dialog_base>=1"]
 }