feat: Add channel notification event tracking.

Bumps schema version to 2.
Adds Profiles module version dep on schema init.
Add notice_events, notice_sub_events, and notice_resub_events tables.
Add corresponding event manager.
Add ChatNotificationWithPayload event payload extension.
Add ChannelNotification subscription.

tracker/payloads.py

@@ -0,0 +1,15 @@
+import twitchio
+
+
+class ChatNotificationWithPayload(twitchio.ChatNotification):
+    """
+    Extends twitchio.ChatNotification to include a _raw field with the original data.
+
+    The subclass registry in twitchio.BaseEvent should automatically register this as the correct event handler.
+    """
+
+    __slots__ = ("_raw",)
+
+    def __init__(self, payload: twitchio.ChannelChatNotificationEvent, *args, **kwargs):
+        super().__init__(payload, *args, **kwargs)
+        self._raw = payload