Add Playable Game of Ur (#110)

* Add plugin
  * To 'Gameplay - Economy & Item Balance' section
    * Adds playable game with betting.
  * https://www.nexusmods.com/morrowind/mods/53914

* Add requirement
  * https://www.nexusmods.com/morrowind/mods/44945
  * Plugin is not a master but is a hard requirement due to reference to
    rulebook in it.

masterlist.yaml

@@ -720,6 +720,12 @@ plugins:
         subs: [ 'Ownership Overhaul plugin' ]
         condition: 'many("Ownership Overhaul\.es[mp]")'
 
+  - name: 'Playable Game of Ur.esp'
+    url:
+      - link: 'https://www.nexusmods.com/morrowind/mods/53914/'
+        name: 'Playable Game of Ur'
+    req: [ 'The_Royal_Game_Of_Ur.esp' ]
+
 ###### Gameplay - Mount & Follower Managers ######
 ###### Gameplay - NPC Balance & Distribution ######
 ###### Gameplay - NPC Behaviour & Dialogue ######