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.

locale/en.properties

@@ -25,8 +25,6 @@ menu/settings = Settings
 menu/exit = Exit
 menu/newgame = New Game
 ui/add_to_party = New party member
-ui/journal/new = New journal entry
-ui/journal/updated = Quest updated
 ui/battle/next = End turn
 ui/battle/endgame = End
 ui/battle/endgame/to_main_menu = Main menu
@@ -70,36 +68,6 @@ characters/action/stun/description = Stuns the target for 2 turns
 characters/skills/slave_master_name = Slave Trader
 characters/skills/slave_master = Gives the ability to enslave a defeated enemy with a base chance of 10%. The upkeep of the slave falls on your shoulders.
 characters/skills/effects/recruit = recruitment chance
-settings/back = Back
-settings/audio = Audio
-settings/sounds = Sounds
-settings/music = Music
-settings/volume = Volume
-settings/language = Language
-settings/lang_ru = Russian
-settings/lang_en = English
-settings/lang_zh = 中文
-settings/tab_general = General
-settings/tab_audio = Sound
-settings/tab_display = Display
-settings/display = Display
-settings/window_mode = Window Mode
-settings/window_mode_windowed = Windowed
-settings/window_mode_fullscreen = Fullscreen
-settings/window_mode_borderless = Borderless
-settings/resolution = Resolution
-settings/monitor = Monitor
-settings/monitor_screen = Screen {0} ({1}x{2})
-settings/vsync = V-Sync
-settings/scale = Scale
-settings/scale_1x = 1x
-settings/scale_2x = 2x
-settings/scale_3x = 3x
-settings/scale_4x = 4x
-settings/tab_mods = Mod Settings
-settings/mod_list_title = Mods
-settings/mods_no_settings = No mod settings available
-settings/mods_reset = Reset to Defaults
 launcher/title = Settings
 launcher/play = Play
 launcher/exit = Exit