Finish support for multiple games

* Adds game filter to ModList.
* Prefixes search results with game
* Adds `&game=X` to URL for mods
* Loads json from new directories on static server

styles/ModList.module.css

@@ -70,6 +70,11 @@
   width: 175px;
 }
 
+.game {
+  min-width: 175px;
+  width: 175px;
+}
+
 .filter {
   width: 175px;
 }