[Translation] Adjust links automatically

Links to other pages need to be adjusted automatically. See all details in #129

a. The agency Alicia is working with provides already today a link mapping spreadsheet. We could leverage that - we can define the format.
b. The tracker document could be extended to contain a default sheet with URL / locale mapping and a sheet per locale that contains the link mapping rules
c. The logic could be: a simple mapping source link -> destination link. If the source url is not in the list, replace the country / language in the url by the new one
d. The link transformation would happen client side after the files have been save to Sharepoint:
- read the mapping sheet
- for each file and each locale, preview, fetch md, apply link replacement rules, save as Word, override Word file

e. This might be a concern if we run this for 400+ files and 10 locales... (4k search and replace)

Start by reading the linked issue #129 and reviewing the existing tracker document and the agency's link-mapping spreadsheet described here. Define the mapping format and transformation workflow before implementation; done should include a documented approach for applying locale-specific link replacements across generated files and handling the stated scale concern.

Written by the indexing model from the issue text.