Rename cthangover_story to cthangover_game

The mod holding the main game's own scenes and story follows the <game>_game
naming rule; further parts stay <game>_<part>, reusable content is <theme>_pack.

manifest.json

@@ -1,5 +1,5 @@
 {
-  "id": "cthangover_story",
+  "id": "cthangover_game",
   "name": "Cthangover: Story",
   "version": "2.0.0",
   "author": "ct",