[web] Connect ComposeSubchannel modal with keyserver
Connecting ComposeSubchannelModal with keyserver api. Now, we can create subchannels on web.
- Go to any chat
- Open thread menu
- Open Create new subchannel
- Try to create any subchannel via ComposeSubchannel
For now, we don't have implemented announcement channels yet. In this case, when we try to create any type of announcement channels, this communiqué will appear:
In other cases, after successfully thread creation, we will be redirected to a newly created subchannel.
Reviewers: tomek, atul, ginsu, abosh
Reviewed By: tomek
Subscribers: ashoat, tomek, atul, abosh
Differential Revision: https://phab.comm.dev/D5211