backend, frontend: prepare remote control: This is a series of changes necessary to prepare the implementation of remote control feature: - XEP-0166: add a `priority` attribute to `ApplicationData`: this is needed when several applications are working in a same session, to know which one must be handled first. Will be used to make Remote Control have precedence over Call content. - XEP-0166: `_call_plugins` is now async and is not used with `DeferredList` anymore: the benefit to have methods called in parallels is very low, and it cause a lot of trouble as we can't predict order. Methods are now called sequentially so workflow can be predicted. - XEP-0167: fix `senders` XMPP attribute <=> SDP mapping - XEP-0234: preflight acceptance key is now `pre-accepted` instead of `file-accepted`, so the same key can be used with other jingle applications. - XEP-0167, XEP-0343: move some method to XEP-0167 - XEP-0353: use new `priority` feature to call preflight methods of applications according to it. - frontend (webrtc): refactor the sources/sink handling with a more flexible mechanism based on Pydantic models. It is now possible to have has many Data Channel as necessary, to have them in addition to A/V streams, to specify manually GStreamer sources and sinks, etc. - frontend (webrtc): rework of the pipeline to reduce latency. - frontend: new `portal_desktop` method. Screenshare portal handling has been moved there, and RemoteDesktop portal has been added. - frontend (webrtc): fix `extract_ufrag_pwd` method. rel 436

This directory contains files related to Libervia but not directly used by it.

* file _li:
    This is the completion file for zsh. To use it, you need to have it in a path accessible in your fpath variable, and to have completion activated. This can be done by the following commands in your .zshrc:

### .zshrc completion ###
fpath=(/path/to/directory/with/_li/ $fpath)
autoload -U compinit
compinit
### end of .zshrc completion ###

    Then, you should be able to complete a li command line by pressing [TAB].

* org.libervia.Libervia.service:
	This file is used by D-Bus to know how to launch the backend, you have to put in in D-Bus services dir (usually /usr/share/dbus-1/services)

* org.libervia.Libervia*.metainfo.xml:
	AppStream metadata as specified at https://www.freedesktop.org/software/appstream/docs/

* org.libervia.LiberviaTUI.desktop:
	Desktop entry for TUI frontend as specified at https://specifications.freedesktop.org/desktop-entry-spec/