Unify input methods with the installer keyboard selection

test/shell.d/input-method-test.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -euo pipefail
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+OMARCHY_PATH="$ROOT" python "$ROOT/test/shell.d/input-method-checks.py"