Ajout de la page irc_xmpp

Squashed commit of the following:

commit 2c33ffa033
Author: masq <root@freepoteries.fr>
Date:   Thu Oct 8 09:18:51 2026 +0200

    [irc_xmpp] add informations for connection to biboumi using profanity client

content/irc_xmpp.rst

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+#############
+IRC over XMPP
+#############
+
+:date: 2026-10-08 09:00:00
+:modified: 2026-10-08 09:00:00
+:tags: instant-messaging, communication, chat
+:category: how-to
+:slug: irc-xmpp
+:authors: Ms.Leave-A-Mix
+:summary: Biboumi usage with several XMPP clients
+
+---------
+Profanity
+---------
+
+The example is documented for the connection to the following channel :
+
+#interhack on libera.chat server, with nickname "m_m" and password
+"MDPNICKSERV".
+
+
+Join the channel:
+
+.. code-block:: irc
+
+    /join "#interhack%irc.libera.chat@irc.xmpp.zered.net" nick m_m
+
+Configure the connection to the server:
+
+.. code-block:: irc
+
+    /win irc.libera.chat@irc.xmpp.zered.net
+    /cmd exec configure
+
+    # Set nickname
+    /field7 m_m
+
+    # Set nickserv password
+    /field9 add privmsg NickServ :identify MDPNICKSERV
+
+    /form submit
+
+Switch to the channel and configure:
+
+.. code-block:: irc
+
+    /win #channel%irc.libera.chat@irc.xmpp.zered.net
+
+    /cmd exec configure
+
+    # Set history for channel
+    /field1 true
+
+    # Set channel as persistent
+    /field4 on
+
+    /form submit
+
+