feat: implement apps:list

Also deprecate the `apps` command in favor of `apps:list`

plugins/apps/internal-functions

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
+
+apps_list_cmd() {
+  declare desc="lists all apps"
+  local cmd="apps"
+  local app
+
+  dokku_log_info2_quiet "My Apps"
+  for app in $(dokku_apps); do
+    echo "$app"
+  done
+}