mobile: support images (#536)

* ios api

* ios wip

* android wip

* ios files folder

* ios get address on start

* android app files folder

* ios more backend

* android more backend

* translation

* ios image without text, remove preview

* android image without text, remove preview

* fix translation

* file name in previews and w/t text

* Revert "file name in previews and w/t text"

This reverts commit 0110570e55.

* ios filename in preview

* android filename in preview

* android wider images

* ios determine width on image for correct quote width

* ios images in previews wip

* ios square image in quote

* ios: update image layout

* android images in quotes

* android remove redundant modifier

* android clip to bounds

* android - image in right side of quote

* android refactor image view

* android - refactor, align quote text top

* android fix emoji view

* fix image layout

* full screen image view, fix quote layout

* android various size

* android fixed image width

* android meta on image

* ios: add drag gesture to hide full-screen image

* android: make image-only meta white

* refactor file.stored

* android: meta icon color

* android: open chat scrolled to last unread item

* copy/share image messages

* android: full screen image

* check file is loaded

* terminal: refactor view for messages with files

* android: change to onClick, only show stored file

* android: remove close sheet bar

* android: close image view on click

* translation

* android: pass showMenu to CIImageView to show menu on long click

* increase DropDown width

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>

apps/android/app/src/main/res/values/strings.xml

@@ -70,6 +70,12 @@
   <string name="this_text_is_available_in_settings">This text is available in settings</string>
   <string name="your_chats">Your chats</string>
 
+  <!-- ComposeView.kt -->
+  <string name="attach">Attach</string>
+
+  <!-- Images -->
+  <string name="image_descr">Image</string>
+
   <!-- Chat Info Actions - ChatInfoView.kt -->
   <string name="delete_contact__question">Delete contact?</string>
   <string name="delete_contact_all_messages_deleted_cannot_undo_warning">Contact and all messages will be deleted - this cannot be undone!</string>