v0.9.6: Add country original amount metadata (#30)

* Add country and original_amount metadata for international credit card transactions

Extract country code and original currency amount from international PDF
transaction lines and emit them as beancount metadata. Also move city
metadata out of the no_facturado-only block so it's emitted for any
transaction that has it.

* Bump version to 0.9.6

* Fix ruff format: remove extra alignment spacing in dataclass fields