feat: sanitize docker inspect output with ps:inspect

Often-times, we will want to have the container inspect output for debugging purposes, but this process is:

- error prone, as the user needs to know what their containers are
- potentially insecure, as the output must be sanitized of sensitive data

Instead of making users wade through this process, we provide a helper `ps:inspect` command, that can be used to diagnose problems associated with containers that may or may not exist for an application.

plugins/ps/subcommands/inspect

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+source "$PLUGIN_AVAILABLE_PATH/ps/internal-functions"
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+
+cmd-ps-inspect "$@"