Expand block reference schema (#121)

* Fix typo in module name
* Add sound_event schema and add it where appropriate
* Add more fields to block reference and fill some missing fields
* Use molang definition for tags

source/behavior/entities/format/components/npc.json

@@ -92,6 +92,13 @@
                 "$comment": "UNDOCUMENTED",
                 "type": "integer",
                 "minimum": 0
+              },
+              "mark_variant": {
+                "title": "Mark Variant",
+                "description": "UNDOCUMENTED.",
+                "$comment": "UNDOCUMENTED",
+                "type": "integer",
+                "minimum": 0
               }
             }
           }