Make the IRC information a bit more consistent and pretty (#51652)

* README.md: Improve IRC part

Use Libera Chats own webchat, list the website instead of the irc server pool

* en.motd: Point to the website instead of the irc server pool

* de.motd: Point to the website instead of the irc server pool

* ru.motd: Point to the website instead of the irc server pool

* zh_CN.motd: Point to the website instead of the irc server pool

README.md

@@ -69,8 +69,7 @@ GitHub repo:
 https://github.com/CleverRaven/Cataclysm-DDA
 
 IRC:
-`irc.libera.chat` ; `#CataclysmDDA`
-https://kiwiirc.com/nextclient/irc.libera.chat#CataclysmDDA
+`#CataclysmDDA` on [Libera Chat](https://libera.chat), https://web.libera.chat/#CataclysmDDA
 
 Official Discord:
 https://discord.gg/jFEc7Yp

data/motd/de.motd

@@ -13,7 +13,7 @@
 Nimm an der Diskussion in den Foren und Chaträumen teil:
 * Discourse:                 https://discourse.cataclysmdda.org/
 * Discord:                   https://discord.gg/jFEc7Yp
-* IRC:                       #CataclysmDDA auf irc.libera.chat
+* IRC:                       #CataclysmDDA auf libera.chat
 * Reddit (inoffiziell):      https://www.reddit.com/r/cataclysmdda/
 
 Andere nützliche Links sind auch auf unserer Homepage verfügbar.

data/motd/en.motd

@@ -15,7 +15,7 @@
 
 <color_light_gray>* Discourse:                 </color><color_cyan>https://discourse.cataclysmdda.org/</color>
 <color_light_gray>* Discord:                   </color><color_cyan>https://discord.gg/jFEc7Yp</color>
-<color_light_gray>* IRC:                       </color><color_cyan>#CataclysmDDA at irc.libera.chat</color>
+<color_light_gray>* IRC:                       </color><color_cyan>#CataclysmDDA at libera.chat</color>
 <color_light_gray>* Reddit (unofficial):       </color><color_cyan>https://www.reddit.com/r/cataclysmdda/</color>
 
 <color_light_gray>Other useful links are also available at our Homepage.</color>

data/motd/ru.motd

@@ -13,7 +13,7 @@
 Участвуйте в обсуждениях на форумах и чатах:
 * Discourse:                 https://discourse.cataclysmdda.org/
 * Discord:                   https://discord.gg/jFEc7Yp
-* IRC:                       #CataclysmDDA at irc.libera.chat
+* IRC:                       #CataclysmDDA at libera.chat
 * Reddit (неофициальный):    https://www.reddit.com/r/cataclysmdda/
 
 Остальные полезные ссылки можно найти на нашем сайте.

data/motd/zh_CN.motd

@@ -13,7 +13,7 @@
 加入论坛讨论或聊天频道:
 * Discourse:                 https://discourse.cataclysmdda.org/
 * Discord:                   https://discord.gg/jFEc7Yp
-* IRC:                       #CataclysmDDA at irc.libera.chat
+* IRC:                       #CataclysmDDA at libera.chat
 * Reddit (非官方):           https://www.reddit.com/r/cataclysmdda/
 
 游戏主页上有更多的相关链接。