[PATCH] add EUR for Bulgaria/Lew

[PATCH] add EUR for Bulgaria/Lew

Bulgaria will join Eurozone 2026-01-01 at which time around the default
needs to be switched

see https://www.ecb.europa.eu/press/pr/date/2025/html/ecb.pr250708~b9676a9fa8.de.html for the conversion rate

This is the < 26.2 version including the euro wizard (cf.
b1a2f727ca99ecd3402d4b051b99cbfd24266e59)

Change-Id: I840ddda4308549703c53f998812848888dd830f6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/189279
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins
Gbp-Pq: Name add-EUR-for-Bulgaria-Lew.diff