Add initial XWiki role draft

- Added web-app-xwiki draft role with config, vars, templates, and docs
- Registered new network and port for XWiki
- Adjusted MediaWiki canonical domain to media.wiki

https://chatgpt.com/share/68c18c65-a008-800f-8d62-b695df2c6fa1

group_vars/all/09_networks.yml

@@ -102,6 +102,8 @@ defaults_networks:
       subnet: 192.168.103.208/28
     web-app-bridgy-fed:
       subnet: 192.168.103.224/28
+    web-app-xwiki:
+      subnet: 192.168.103.240/28
 
     # /24 Networks / 254 Usable Clients
     web-app-bigbluebutton:

group_vars/all/10_ports.yml

@@ -75,6 +75,7 @@ ports:
       web-app-bluesky_view: 8051
       web-app-magento: 8052
       web-app-bridgy-fed: 8053
+      web-app-xwiki:      8054
       web-app-bigbluebutton: 48087    # This port is predefined by bbb. @todo Try to change this to a 8XXX port
   public:
     # The following ports should be changed to 22 on the subdomain via stream mapping