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* Remove outdated or internal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

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

bin/omarchy-launch-about

@@ -1,5 +1,5 @@
 #!/bin/bash
 
-# Launch the fastfetch TUI that gives information about the current system.
+# omarchy:summary=Launch the fastfetch TUI that gives information about the current system.
 
 exec omarchy-launch-or-focus-tui "bash -c 'fastfetch; read -n 1 -s'"