Migrate site to Vite and Vike for SSG

[mrm007]

• Replaced Gatsby with Vite + Vike for SSG
• Syntax highlighting is now done client-side only. This avoids issues with SSR, hydration errors, and makes the site snappier.
• Upgraded a lot of dependencies
  • Dev deps: Node.js 20, pnpm 8, TypeScript 5.3
  • Major libs: Emotion 11, Chakra UI v2, React v18
  • Minor libs: Downshift 8, React Syntax Highlighter 15
  • Uplifted TSConfig options
• Tested Corepack in CI instead of using pnpm/action-setup which displays a warning about Node.js 16
  • related: https://github.com/pnpm/action-setup/issues/99

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: 397f0ebfe4ca052321f72481f8b6bcf82bc14aab

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[askoufis]

Noticed that clicking the autosuggest displays a blank suggestions list.

https://github.com/seek-oss/capsize/assets/5663042/46b3d3d6-0e40-4179-be3b-1280f197bf7d