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.

scenes/menu/game_menu.tscn

@@ -0,0 +1,90 @@
+[gd_scene load_steps=2 format=3]
+
+[ext_resource type="Script" path="res://mods/ui_base/src/Menu/GameMenu.cs" id="GameMenuScript"]
+
+[node name="GameMenu" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 1
+script = ExtResource("GameMenuScript")
+
+[node name="Bg" type="ColorRect" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0, 0, 0, 0.9)
+
+[node name="Panel" type="Panel" parent="."]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -200.0
+offset_top = -220.0
+offset_right = 200.0
+offset_bottom = 220.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="Margin" type="MarginContainer" parent="Panel"]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+theme_override_constants/margin_left = 28
+theme_override_constants/margin_top = 20
+theme_override_constants/margin_right = 28
+theme_override_constants/margin_bottom = 20
+
+[node name="VBox" type="VBoxContainer" parent="Panel/Margin"]
+layout_mode = 2
+theme_override_constants/separation = 10
+
+[node name="Title" type="Label" parent="Panel/Margin/VBox"]
+layout_mode = 2
+theme_override_font_sizes/font_size = 24
+theme_override_colors/font_color = Color(0.956863, 0.941176, 0.905882, 1)
+text = "Меню"
+horizontal_alignment = 1
+uppercase = true
+
+[node name="ReturnBtn" type="Button" parent="Panel/Margin/VBox"]
+layout_mode = 2
+text = "Вернуться"
+theme_type_variation = "CthangoverPrimary"
+
+[node name="SaveBtn" type="Button" parent="Panel/Margin/VBox"]
+layout_mode = 2
+text = "Сохранить"
+
+[node name="LoadBtn" type="Button" parent="Panel/Margin/VBox"]
+layout_mode = 2
+text = "Загрузить"
+
+[node name="SettingsBtn" type="Button" parent="Panel/Margin/VBox"]
+layout_mode = 2
+text = "Настройки"
+
+[node name="Spacer" type="Control" parent="Panel/Margin/VBox"]
+layout_mode = 2
+custom_minimum_size = Vector2(0, 16)
+
+[node name="MainMenuBtn" type="Button" parent="Panel/Margin/VBox"]
+layout_mode = 2
+text = "Главное меню"
+
+[node name="ExitBtn" type="Button" parent="Panel/Margin/VBox"]
+layout_mode = 2
+text = "Выход"
+theme_type_variation = "CthangoverDanger"

scenes/ui/message.tscn

@@ -0,0 +1,18 @@
+[gd_scene format=3]
+
+[ext_resource type="Script" path="res://mods/ui_base/src/Messages/UiMessage.cs" id="1_msg"]
+
+[node name="Message" type="Control" node_paths=PackedStringArray("textField")]
+layout_mode = 3
+anchors_preset = 0
+script = ExtResource("1_msg")
+textField = NodePath("Label")
+
+[node name="Label" type="Label" parent="."]
+layout_mode = 0
+offset_left = 0.0
+offset_top = 0.0
+offset_right = 0.0
+offset_bottom = 0.0
+theme_override_colors/font_color = Color(0.909804, 0.898039, 0.870588, 1)
+text = ""