export C interface, started mobile app (#210)

* initial mobile app design draft

* add proposals

* xcode project

* refactor function to send to view as parameter

* export C interface

* remove unused files

* run chat from chatInit

* split chatStart to a separate function

* replace file-embed with QQ

* add mobile views

* server using IP address

* pass dbFilePrefix as parameter to chatInit

* comment on enabling logging

* fix mobile db config

* update C API, make user non-optional in ChatController

* restore SMP server addresses

* revert the change in the tests

* flip dependency - now Controller depends on Terminal

* make ChatController independent of terminal package

* fix Main.hs

* add iOS .gitignore

* refactor Simplex.Chat.Terminal

Co-authored-by: Efim Poberezkin <8711996+efim-poberezkin@users.noreply.github.com>

src/Simplex/Chat/Styled.hs

@@ -6,6 +6,7 @@ module Simplex.Chat.Styled
     StyledFormat (..),
     styleMarkdown,
     styleMarkdownText,
+    unStyle,
     sLength,
     sShow,
   )
@@ -69,6 +70,10 @@ sgr = \case
   Snippet -> []
   NoFormat -> []
 
+unStyle :: StyledString -> String
+unStyle (Styled _ s) = s
+unStyle (s1 :<>: s2) = unStyle s1 <> unStyle s2
+
 sLength :: StyledString -> Int
 sLength (Styled _ s) = length s
 sLength (s1 :<>: s2) = sLength s1 + sLength s2