feat: Add l10n configuration for transifex

[come-nc]

fix #61

[come-nc]

/backport to stable31

[come-nc]

/backport to stable30

[backportbot]

The backport to stable30 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable30
git pull origin stable30

# Create the new backport branch
git checkout -b backport/315/stable30

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 7241b474

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/315/stable30

Error: Failed to check for changes with origin/stable30: No changes found in backport branch

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.