Changes applied here introduce backing up keycards data to and fetch them from waku.
Information about received keycards data is sent via `sync.from.waku.keycards` signal.
Changes applied here introduce backing up profile data (display name and identity
images) to waku and fetch them from waku. Information about those data is sent
as a separate signal to a client via `sync.from.waku.profile` signal.
New signal `sync.from.waku.progress` is introduced which will be used to notify a client
about the progress of fetching data from waku.
This introduces a flag to configure whether `Messenger.CreateCommunity`
should create a default channel.
As discussed in https://github.com/status-im/status-go/issues/2758, this
is needed for the upcoming functionality to import discord communities.
Closes#2758
We periodically check whether we should backup contacts through waku.
Currently it's not tied to any event, it will only schedule a backup on
a tick, or through the provided API endpoint.
