Start working on the GObject generator for event types

schemas/m.room.join_rules

@@ -0,0 +1,30 @@
+{
+    "type": "object",
+    "title": "Describes how users are allowed to join the room.",
+    "description": "A room may be ``public`` meaning anyone can join the room without any prior action. Alternatively, it can be ``invite`` meaning that a user who wishes to join the room must first receive an invite to the room from someone already inside of the room. Currently, ``knock`` and ``private`` are reserved keywords which are not implemented.",
+    "allOf": [{
+        "$ref": "core-event-schema/state_event.yaml"
+    }],
+    "properties": {
+        "content": {
+            "type": "object",
+            "properties": {
+                "join_rule": {
+                    "type": "string",
+                    "description": "The type of rules used for users wishing to join this room.",
+                    "enum": ["public","knock","invite","private"]
+                }
+            },
+            "required": ["join_rule"]
+        },
+        "state_key": {
+            "type": "string",
+            "description": "A zero-length string.",
+            "pattern": "^$"
+        },
+        "type": {
+            "type": "string",
+            "enum": ["m.room.join_rules"]
+        }
+    }
+}