Features:

• [#667] Add insert image for the popup menu of the chat input area.
• [#664, #666] port snapcraft from core20 to core24.
• [#665] introduce soversion for iptux-core library.
• [#657] improve log
• [#625] support flatpak
• [#642] add a new option to hide taskbar when main window iconified.

Bugfixes:

• [#658] after close dialog and reopen, the image no longer exists.
• [#656] fix iptux stackoverflow when receiving directory.
• [#645] check exist preference dialog before open a new one.
• [#628] fix wrap mode of chat dialog.
• [#614] no extra \U0001 when sending image.