Hand shared resources to the mods that use them

Findings of the resource atlas: engine and shell mods took these
resources from the content mod without depending on it.
- Main menu music (Serpent's Lament + the mainmenu playlist) -> base_menu.
- Battle win/defeat sounds -> turn_battle_base; UI sounds close_click and
  skip -> interface; card selection effect -> card_battle.
- Journal notification texts (ui/journal/new, updated) -> quests_base;
  settings screen texts (settings/*) -> base_menu.
- depends now declares characters_base, items_base and quests_base, whose
  resources the content uses.

manifest.json

@@ -5,7 +5,7 @@
   "author": "ct",
   "description": "Visual novel content and UI on top of the 2D platform: scenarios, characters, items, quests and the dialog layer patched into the base shell",
   "category": "engine, story",
-  "depends": ["base2d>=1", "dialog_base>=1", "interactive_base>=1", "skills_base>=1", "map_base>=1", "interface>=1"],
+  "depends": ["base2d>=1", "dialog_base>=1", "interactive_base>=1", "skills_base>=1", "map_base>=1", "interface>=1", "characters_base>=1", "items_base>=1", "quests_base>=1"],
   "ui": [
     {
       "id": "map",