Use theme with support for RTL languages

came up in the context of #59 issue with Arabic translation -- https://github.com/saeiddrv/SphinxMinooTheme seems to be one of such themes

Read issue #59 for the Arabic-translation context, then inspect the repository's current theme configuration and compare it with SphinxMinooTheme. Confirm how the documentation is built and whether the selected theme renders right-to-left Arabic content correctly; the issue needs a more specific target before implementation can be considered done.

Written by the indexing model from the issue text.