Precise/non-hardcoded power level bridging

[tulir]

Power levels are currently bridged with preset values: In chats, 50 = admin and 95 = creator and in channels/supergroups 50 = moderator (admin who can't add other admins), 75 = admin and 95 = creator.

These values could be read from the power level requirements rather than using the hardcoded values. Also, the separate admin rights could be precisely bridged using the power level requirements.

[tulir]

I think I'll wait for matrix-org/matrix-spec-proposals#2812 or similar Matrix permission system overhaul before trying to do this.

[VityaSchel]

Is it possible to fetch channel permissions during sync? I can't post in my own telegram channel via matrix, I get "You do not have permission to post to this room" error and no way to change that in room settings, tried creating it myself but it won't let me