Heisenbridge

- Fix compat with Synapse 1.47.0

This is a **critical** fix for anyone upgrading Synapse. No other changes.

- Implement "best effort" basic IRC moderation in plumbed rooms if bot has ops on IRC
- Allow configuring topic sync for plumbs (IRC<->Matrix or one way)
- Allow using forward slash (/) as MXID separator for IRC ghosts
- Bump max mautrix version to <0.12

The separator for IRC ghosts can now be changed to forward slash (/) from the default underscore (_). This happens by modifying the regex in the registration file. Only do this for new installations and it will cause all IRC users to duplicate in rooms who you can't remove and probably other bad side effects as well. The default may be changed in the future.

- Make reconnect loop more robust
- Sensitive flag for MSG and NICKSERV to hide it from network room (for AUTOCMD)
- Improved STATUS for admin room and simple STATUS for network rooms
- Small fixes

- Allow opening multiple simultaneous connections to the same network
- New STOP/STAHP ROOM command to end a long paste flood
- Clear channel send queue if the user gets kicked to prevent continuing flood on rejoin
- New KB ROOM command to do a proper kick & ban (contributed by GitHub user blastrock, thanks!)

Upgrading from previous version to v1.5.0 will cause a small migration for every channel/pm that is open so it might take a little longer for the first startup to complete. If no multiple network connections are opened it is safe to downgrade but if someone uses the feature it will cause shenanigans for the duplicate networks in the older version.

- Fix ROOM -h not working
- Prevent AVATAR command from updating displayname

- Free form AUTOCMD after joining a channel, per channel
- Automatic rejoin on invite or kick (invite enabled by default)
- AVATAR network room command to set avatars for IRC users (admin only)
- WHOIS room command for PMs, PART for channels
- Add ROOM command in network room to run channel room commands safely
- Move PLUMBCFG stuff under ROOM command

QoL stuff, remember to use ROOM command instead of PLUMBCFG now.