This commit adds the ability to set the master push rule and set push rules for individual rooms as per the matrix spec. See https://spec.matrix.org/v1.3/client-server-api/#push-rules.
The master push rule is just on/off and uses the existing notification setting in general setting to enable/disable the server default master push rule .m.rule.master.
For each room there is now a page in the room setting that allows the following to be set:
- Default
- All messages
- @mentions and keywords
- off
New room or override rules are added/removed to achieve this.
There is also functionality to check the master/room notification state whenever the setting menu is entered. This allows the status to be updated if changed in another client or get the initial state for a room as it isn't stored.
Note - There is currently no menu items in the room list for setting the room push rule settings. This will be added in a later commit, the aim is to focus on making sure the technical implementation is good for now.
