Update cthangover_game implementation, assets and documentation

manifest.json

@@ -5,8 +5,34 @@
   "author": "ct",
   "description": "The story content of Cthangover: scenes, scenarios, characters, items, quests and the world map of Marao's very bad night. The machinery lives in engine mods.",
   "category": "story",
-  "depends": ["shell2d_base>=1", "dialog_base>=1", "interactive_base>=1", "skills_base>=1", "map_base>=1", "ui_base>=1", "characters_base>=1", "items_base>=1", "quests_base>=1", "town_pack>=1", "music_pack>=1"],
+  "depends": [
+    "shell2d_base>=1",
+    "dialog_base>=1",
+    "interactive_base>=1",
+    "skills_base>=1",
+    "map_base>=1",
+    "ui_base>=1",
+    "characters_base>=1",
+    "items_base>=1",
+    "quests_base>=1",
+    "town_pack>=1",
+    "music_pack>=1"
+  ],
+  "sources": [
+    "src/**/*.cs"
+  ],
   "test_suites": [
-    {"id": "site_shots", "activate": ["--itest=site_shots"]}
+    {
+      "id": "site_shots",
+      "activate": [
+        "--itest=site_shots"
+      ]
+    },
+    {
+      "id": "marao_avatars",
+      "activate": [
+        "--itest=marao_avatars"
+      ]
+    }
   ]
 }