This PR redesigns the website. In addition to updating visuals, it:
- Adds a Code of Conduct.
- Adds an Accessibility Statement.
- Adds an industry Spotlight.
- Expands and updates Resources.
- Adds Sponsorship and Open Collective.
- Replaces Jekyll with Eleventy.
- Migrates content.
- Converts data to JSON.
- Migrates GitHub pages (Content Style Guide, Code of Conduct, etc.) to the website.
- Deprecates Follow, Patterns, and Events.