feat: add support for enhanced help output

subcommands/export

@@ -4,7 +4,12 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_BASE_PATH/common/functions"
 source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/functions"
 
-postgres-export-cmd() {
+service-export-cmd() {
+  #E by default, datastore output is exported to stdout
+  #E dokku $PLUGIN_COMMAND_PREFIX:export lolipop
+  #E you can redirect this output to a file
+  #E dokku $PLUGIN_COMMAND_PREFIX:export lolipop > lolipop.dump
+  #A service, service to run command against
   declare desc="export a dump of the $PLUGIN_SERVICE service database"
   local cmd="$PLUGIN_COMMAND_PREFIX:export" argv=("$@"); [[ ${argv[0]} == "$cmd" ]] && shift 1
   declare SERVICE="$1"
@@ -14,4 +19,4 @@ postgres-export-cmd() {
   service_export "$SERVICE"
 }
 
-postgres-export-cmd "$@"
+service-export-cmd "$@"