core, ui: terminal chat layout for LLM and service bot chats (#7811)

* plan: UI improvements to improve LLM usage via SimpleX

* core, ui: types for chat layout

* core, ui: settings for alternative terminal-like chat layout for managing LLMs or other service bots

* plan: message priority

* fixes

* query plan

* update plans

* remove silent messages plan

* rename migrations

* implement layout

* amend

* fix

* fix

* fix

* improve

* time on the right, sender name in blue

* no avatar in direct chats

* better previews

* update, fixes

* update

* time gap

* changes

* ui: terminal layout line heights, gaps and time placement

* ui: simplify terminal meta layout, correct its docs and tests

* ui: right-to-left emoji edge in terminal rows, time placement tests

* android, desktop: raise Kotlin compiler memory to 4 GB

* ui: terminal captions as follow-up text, classic event separators

* ui: terminal media edge and overlay time, plan decisions

* ui: simplify terminal row separation, correct doc line references

* ui: keep the media time inside terminal rows, restore caption conditions

* ui: terminal heading capitals at large font scales, idle live message time

* ui: rename the classic voice-with-text flag, correct the meta copy docs

* ui: smaller terminal layout diff, sender gap and meta names

* ui: terminal row as tall as the media time

* docs: remove the chat layout section from the bots readme

* docs: shorten the terminal layout section of the chat view

* core: address settings API as on master, /auto_accept reads the stored layout

* ui: smaller terminal headings

* ui: classic sender rows and avatar rule as on master

* ui: classic reply quote text colour as on master

* ios: keep the chat layout setting with other UI settings

* ui: go-to button at the end of terminal rows, no gutter in direct chats

* ui: forwarded arrow on the header line of terminal rows, above the time

* ui: forwarded arrow centred above the time line of terminal rows

---------

Co-authored-by: Evgeny Poberezkin <evgeny@poberezkin.com>

docs/protocol/simplex-chat.md

@@ -264,6 +264,8 @@ Currently members can have one of four roles - `owner`, `admin`, `member` and `o
 
 `x.grp.info` message is sent to all members by the member who updated group profile. Only group owners can update group profiles. Clients MAY implement some conflict resolution strategy - it is currently not implemented by SimpleX Chat client. This message MUST only be sent by members with `owner` role. Receiving clients MUST ignore this message if it is received from member other than with `owner` role.
 
+Group profile can include optional `chatLayout` property (`classic` or `terminal`) set by a group owner. Clients use it as the layout of the group chat, also after it is changed by `x.grp.info`, unless the user chose another layout for this chat. Clients MUST treat unknown values as absent.
+
 `x.grp.direct.inv` message is sent to a group member to propose establishing a direct connection between members, thus creating a contact with another member.
 
 `x.grp.msg.forward` message is sent by inviting member to forward messages between introduced members, while they are connecting. This message MUST NOT contain another `x.grp.msg.forward` message.

docs/protocol/simplex-chat.schema.json

@@ -61,6 +61,7 @@
           "type": "string",
           "metadata": {"comment": "group purpose / short description (160 characters)"}
         },
+        "chatLayout": {"enum": ["classic", "terminal"]},
         "groupPreferences": {
           "optionalProperties": {
             "commands": {