import contact channel details from pad

* collaborative anonymous editing, but list known contributors
* https://scalar.vector.im/etherpad/p/!qLhNfILESSCaasbRWB_freedombox.emorrp1.name_Org

Co-authored-by: southerntofu

chat-with-us.md

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+<!-- SPDX-License-Identifier: CC0-1.0 -->
+
+# Chat with us!
+
+Discussion is still ongoing about chat systems for the long term, but right now the channels are available on Matrix, XMPP and IRC:
+
+Roomnames: organization, matchmaking, offtopic, chamber, website, translations, sysadmin
+Topic: LibreGaming community - general/organizational discussions. Join #libregaming-ROOM for specific working groups: website, translations, sysadmin --- Pad about organizing our community: https://ttm.sh/2xQ
+
+## Matrix
+
+\#libregaming-roomname:freedombox.emorrp1.name
+
+* Create account at https://tchncs.de/matrix
+* Space https://matrix.to/#/#libregaming-space:matrix.org
+* Subspaces: Communities, Games, Engines, Tools, Historical (lower case as "roomnames")
+* Need to know the hidden room_id for read-only access (and history: Anyone) e.g. https://view.matrix.org/room/!uagwTOyQbbWrZgwyPO:freedombox.emorrp1.name/
+
+## XMPP
+
+xmpp:#libregaming-roomname#freedombox.emorrp1.name@matrix.org?join
+
+* Create account at https://tchncs.de/xmpp
+* https://github.com/matrix-org/matrix-bifrost/wiki/Address-syntax
+
+## IRC
+
+ircs://irc.libera.chat/#libregaming-roomname
+https://web.libera.chat/#libregaming-roomname
+
+* No account required, guest access supported
+* Various features unsupported by libera, so you may be missing nuance of conversation
+* https://github.com/matrix-org/matrix-appservice-irc
+* `org.matrix.appservice-irc.config { "lineLimit": 9, "allowUnconnectedMatrixUsers": true }`