directory: support public channels and relay-based groups (#6840)

* directory: support public channels and relay-based groups (plan)

* types

* amend types

* directory types, resolve known link

* implementation, test fails

* fix test

* fix test

* more test

* minimal test

* more test

* debug test

* clean up

* remove debug logs

* refactor

* use group/channel terms correctly

* remove unsupported commands

* manage profile update

* owner left the channel

* more tests, correct response to sent link

* re-registration

* /help and /link commands

* correct listing for channels

* fix test

* fix bot api

* refactor

* do not include link data in GLPKnown

* refactor

* diff

* undo refactor

* simplify

* remove harness test

* remove flip

* add v6.5 app requirement for channels

* add website support

* update bot api types

* correct member count, fix test

* members -> subscribers

* add link to channel description

* fix css

* move version note

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Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>

website/src/directory.html

@@ -20,14 +20,14 @@ active_directory: true
     word-break: break-word;
   }
 
-  #directory .entry a {
+  #directory .entry a.img-link {
     order: -1;
     object-fit: cover;
     margin-right: 16px;
     margin-bottom: 16px;
   }
 
-  #directory .entry a img {
+  #directory .entry a.img-link img {
     min-width: 104px;
     min-height: 104px;
     width: 104px;