feat: install user console commands and document Office independence

bin/jr-einvoice

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
-root="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
+launcher="$(readlink -f -- "${BASH_SOURCE[0]}")"
+root="$(cd -- "$(dirname -- "$launcher")/.." && pwd)"
 if [[ "${1:-}" == --update ]]; then
     shift
     exec python3 "$root/scripts/update.py" "$@"