Add omarchy CLI (#5477)

* Add omarchy CLI

* Remove outdated or internal

* Add bash completions for command

* Add omarchy command documentation

* Add missing docs

* Correct to what's now right

* Fix tests

---------

Co-authored-by: David Heinemeier Hansson <david@hey.com>

bin/omarchy-update-git

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+# omarchy:summary=Pull the latest Omarchy git changes
+
 set -e
 
 echo -e "\e[32mUpdate Omarchy\e[0m"