Enhancement: Make footers translatable.

[juanfra]

Description

I am adding i18n functions for footers.

I'm still doubtful we should include Twenty Twenty-Five as a hardcoded string in some footers. I know this discussion happened before. I believe that now that we have the copyright block binding, that's a good candidate. Else, re-consider the site title.

Screenshots

N/A

Testing Instructions

1. Open the site editor
2. Try every footer
3. Check that the strings are correct.

[github-actions]

Preview changes

You can preview these changes by following the link below:

• Preview changes for twentytwentyfive

I will update this comment with the latest preview links as you push more changes to this PR.
⚠️ Note: The preview sites are created using WordPress Playground. You can add content, edit settings, and test the themes as you would on a real site, but please note that changes are not saved between sessions.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: juanfra <[email protected]>
Co-authored-by: carolinan <[email protected]>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[carolinan]

I agree that the theme name should not be in the footer. It is common in commercial themes, but in this case, I don't think WordPress needs to strengthen the "Twenty Twenty-Five" name, and the WordPress credit is already in the footer. But I'm not a marketer.

[carolinan]

This can be merged, if we want to handle the theme name text in a separate issue.

[juanfra]

Thanks, @carolinan. I believe we can keep that discussion on an issue to hear different perspectives and merge this one.