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* Remove outdated or internal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-available

@@ -1,6 +1,7 @@
 #!/bin/bash
 
-# Get remote tag
+# omarchy:summary=Get remote tag
+
 latest_tag=$(git -C "$OMARCHY_PATH" ls-remote --tags origin | grep -v "{}" | awk '{print $2}' | sed 's#refs/tags/##' | sort -V | tail -n 1)
 if [[ -z $latest_tag ]]; then
   echo "Error: Could not retrieve latest tag."