core: support content filter for contacts and notes to allow media galleries (#6552)

* core: support content filter for contacts and notes to allow media galleries

* add api to list chat content types, tests

* query plans, api docs

* add indices

bots/src/API/Docs/Commands.hs

@@ -340,6 +340,7 @@ undocumentedCommands =
     "APIGetAppSettings",
     "APIGetCallInvitations",
     "APIGetChat",
+    "APIGetChatContentTypes",
     "APIGetChatItemInfo",
     "APIGetChatItems",
     "APIGetChatItemTTL",

bots/src/API/Docs/Responses.hs

@@ -121,6 +121,7 @@ undocumentedResponses =
     "CRBroadcastSent",
     "CRCallInvitations",
     "CRChatCleared",
+    "CRChatContentTypes",
     "CRChatHelp",
     "CRChatItemId",
     "CRChatItemInfo",