Updates the plugin description and the add tab completer

src/main/resources/plugin.yml

@@ -10,7 +10,11 @@ website: https://git.knarcraft.net
 commands:
   addpaidsign:
     description: Used to add a new paid sign
-    usage: /<command> <id (the text to look for)> <line> <cost> [ignore case] [ignore color]
+    usage: /<command> <name> <cost> [permission] [ignore case] [ignore color]
+    permission: paidsigns.add
+  addpaidsigncondition:
+    description: Used to add a new match condition for a paid sign
+    usage: /<command> <name (of a paid sign)> [executeRegEx] [ignoreCase] [ignoreColor]
     permission: paidsigns.add
   removepaidsign:
     description: Used to remove a paid sign