refactor: split out label subcommands into distinct commands

plugins/haproxy-vhosts/commands

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 [[ " haproxy:help help " == *" $1 "* ]] || exit "$DOKKU_NOT_IMPLEMENTED_EXIT"
 source "$PLUGIN_AVAILABLE_PATH/haproxy-vhosts/help-functions"
+source "$PLUGIN_AVAILABLE_PATH/haproxy-vhosts/command-functions"
 set -eo pipefail
 [[ $DOKKU_TRACE ]] && set -x
 
@@ -9,6 +10,18 @@ case "$1" in
     cmd-haproxy-help "$@"
     ;;
 
+  haproxy:label:add)
+    cmd-haproxy-label-add "$@"
+    ;;
+
+  haproxy:label:remove)
+    cmd-haproxy-label-remove "$@"
+    ;;
+
+  haproxy:label:show)
+    cmd-haproxy-label-show "$@"
+    ;;
+
   *)
     exit "$DOKKU_NOT_IMPLEMENTED_EXIT"
     ;;