Crate-docs-theme

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- SQL-99: Replace regular buttons with HubSpot CTAs
- Fix error with switchover to ``js-cookie`` library

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- Fix ``js-cookie`` library import

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- Fix webpack expose configuration for ``js-cookie`` library

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- Fix copying multi-line console snippets with ``sphinx-copybutton``
- Update JavaScript dependencies across the board
- Replace ``jquery-cookie`` with ``js-cookie``
- Add missing ``loading="lazy"`` to footer images

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- Bump runtime dependency versions
- Bring CI setup up to speed
- Upgrade to Sphinx 5
- Search: Add message if no results were found
- Search: Don't show if ``googleapis.com`` doesn't respond
- SEO: Change Open Graph description length from 300 to 150 characters
- UI: Make tables scroll horizontally on devices with <991px width
- UI: Remove whitespace at the top on SQL-99 on devices <991px width
- UI: Remove column layout from field lists on devices <560px width

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- Fix ``proxied_static_path`` context variable following an RTD update