[PATCH v2 0/24] MR6651: Create occitan translation

[joan-lucì Labòrda (＠joanluc)]

Create occitan translation
- add documentation/README-oc.md
- add po/oc.po
- update po/Makefile.in adding line '       oc.po '

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  v2: Update README-oc.md

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https://gitlab.winehq.org/wine/wine/-/merge_requests/6651