Add emoji support to docs using sphinxemoji ✨

[skylentshore]

This PR adds emoji support to the Open edX documentation via sphinxemoji, enabling use of emojis in .rst files with the |:emoji:| syntax.

The conf.py is updated to include the extension.

Style is set to 'twemoji' for consistency.

A sample line using emojis has been added to the top of index.rst to demonstrate functionality. Happy to remove or relocate that as needed.

All supporting extensions and themes were confirmed working locally.

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[skylentshore]

Hi! The Read the Docs build failed because the new extension (sphinxemoji) isn’t included in the RTD install environment yet. Everything works locally and builds cleanly — happy to help with the RTD config if needed!

CLA has been signed ✅
cc @openedx/docs-openedx-org-maintainers

[mphilbrick211]

Thanks for this contribution, @skylentshore!

Did you receive a fully executed version of the CLA form? Or was it submitted today? The turnaround is about 24 hours. If you haven't heard within a few days, please let me know!

[sarina]

Hi @skylentshore - thanks for the contribution!

You shouldn't need to check in the build files. I would expect the diff to look similar to this one, where we added the 404 extension: #850

[sarina]

Hi @skylentshore - I'd recommend closing this PR and starting a new one. Adding support should be very simple:

• Add the new package to base.in
• Add to conf.py
• Run make upgrade

Then, try adding an emoji to a page in a separate commit, so we can test that it works.