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* Remove outdated or internal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-theme-set

@@ -1,5 +1,9 @@
 #!/bin/bash
 
+# omarchy:summary=Apply an Omarchy theme
+# omarchy:args=<theme-name>
+# omarchy:examples=omarchy theme list | omarchy theme set "Tokyo Night"
+
 if [[ -z $1 ]]; then
   echo "Usage: omarchy-theme-set <theme-name>"
   exit 1