feat: re-add apps and config cli aliases

This better follows Heroku's output and is more useful to users. The subcommands will be treated as the primary, documented versions, while the aliases are there for convenience.

Closes #5362

tests/unit/apps_1.bats

@@ -11,7 +11,7 @@ teardown() {
 }
 
 @test "(apps) apps:help" {
-  run /bin/bash -c "dokku apps"
+  run /bin/bash -c "dokku apps --help"
   echo "output: $output"
   echo "status: $status"
   assert_output_contains "Manage apps"

tests/unit/config.bats

@@ -19,10 +19,17 @@ teardown() {
 }
 
 @test "(config) config:help" {
+  run /bin/bash -c "dokku config --help"
+  echo "output: $output"
+  echo "status: $status"
+  assert_output_contains "Manage global and app-specific config vars"
+  help_output="$output"
+
   run /bin/bash -c "dokku config:help"
   echo "output: $output"
   echo "status: $status"
   assert_output_contains "Manage global and app-specific config vars"
+  assert_output "$help_output"
 }
 
 @test "(config) config:set --global" {