feat(bot): basic webhook username templating

docs/content/command-list.md

@@ -149,6 +149,7 @@ You can have a space after `pk;`, e.g. `pk;system` and `pk; system` will do the
 - `pk;config capitalize IDs [on|off]` - Toggles whether to display IDs as capital letters, to ease readability.
 - `pk;config pad IDs [left|right|off]` - Toggles whether to pad (add a space) 5-character IDs in lists.
 - `pk;config proxy switch [on|off]` - Toggles whether to log a switch whenever you proxy as a different member.
+- `pk;config name format [format]` - Changes your system's username formatting.
 
 ## Server owner commands
 *(all commands here require Manage Server permission)*

docs/content/user-guide.md

@@ -387,6 +387,14 @@ Now, oth of the following will work without needing to add multiple versions of
     John: Hello!
     JOHN: Hello!
 
+### Setting a custom name format
+
+The default proxy username formatting is "{name} {tag}", but you can customize this value in config:
+
+    pk;config nameformat {tag} {name}
+    pk;config nameformat {name}@{tag}
+
+
 ## Interacting with proxied messages
 
 ### Your own messages