Similar to `CheckPermissionToJoin()` we now get
a `CheckChannelPermissions()` API.
It will rely on the same `PermissionResponse` types, but gives
information about both `ViewOnlyPermissions` and
`ViewAndPostPermissions`.
This is needed so that when they are bundled into archives, receiving
nodes can still verify the messages payload using its signature.
This commit introduces a new `waku_messages` table and APIs to store
such messages. Waku message payload is store for any message that has
a topic that matches any of the admin communities chats.
Closes#2566
Pascal Precht
Mykhailo Prakhov
Patryk Osmaczko
Pascal Precht
Parvesh Monu
Andrea Maria Piana
Eric Mastro
RichΛrd