✨Sodo search translation helper added, strings wrapped, ready for translator work!

[cathysarisky]

• There's a clear use-case for this code change, explained below
• Commit message has a short title & references relevant issues
• The build will pass (run yarn test:all and yarn lint)

Translation (t) helper added to sodo-search.
Ghost head tweaked to include data-locale.
All (I hope) strings in sodo-search wrapped in the t helper.

Possibly poor-quality French translation strings added.

[cathysarisky]

OK, so it won't quite pass automated tests, because the snapshot needs to be updated to include a locale in this line:
<script defer src=\\"https://cdn.jsdelivr.net/ghost/sodo-search@~[[VERSION]]/umd/sodo-search.min.js\\" data-key=\\"xyz\\" data-styles=\\"https://cdn.jsdelivr.net/ghost/sodo-search@~[[VERSION]]/umd/main.css\\" data-sodo-search=\\"http://localhost:65530/site/\\" crossorigin=\\"anonymous\\"></script>

I don't know enough about Ghost's testing setup to know whether I'm supposed to edit the snapshot file directly, or if there's a command that generates those, so I'm going to leave it alone and hope someone will help me out here! :)

[vikaspotluri123]

If you run UPDATE_SNAPSHOT=1 yarn test that should update your snapshots!