Allow changing Omarchy branches from the menu

bin/omarchy-update-branch

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -e
+
+if (($# == 0)); then
+  echo "Usage: omarchy-verion-branch-set [master|dev]"
+  exit 1
+fi
+
+new_branch="$1"
+
+# Snapshot before switching branch
+omarchy-snapshot create || [ $? -eq 127 ]
+
+# Checkout the new branch
+git -C $OMARCHY_PATH checkout $new_branch --autostash
+git -C $OMARCHY_PATH diff --check || git -C $OMARCHY_PATH reset --merge
+
+# Update the system from the new branch
+omarchy-update-perform