Collapse help into expandable command topics

plugins/enter/commands

@@ -4,9 +4,23 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 
 case "$1" in
   help | enter:help)
-    cat<<EOF
+    help_content_func () {
+      declare desc="return help_content string"
+      cat<<help_content
     enter <app> [<container-type> || --container-id <container-id>], Connect to a specific app container
-EOF
+help_content
+    }
+
+    if [[ $1 = "enter:help" ]] ; then
+        echo -e 'Usage: dokku enter <app>'
+        echo ''
+        echo 'Allows you to access a bash prompt inside the container of the app.'
+        echo ''
+        echo 'Additional commands:'
+        help_content_func | sort | column -c2 -t -s,
+    else
+        help_content_func
+    fi
     ;;
 
   *)