chore: migrate workspace tooling to vite-plus

[repo] move to pnpm

[repo] misc: delete WIP folder

[website] move contents into website directory

[repo] formatting pass

[repo] Prettier -> Oxfmt

css: revise box-sizing article for clarity and detail (#529)

quiz/html: update the answer of what does a docType Do (#496)

fix: MacOS to macOS (#533)

[feih] s/2025/2026

[rig] state design: fix incorrect closing tag for form example

[rig] Typo and grammar fixes (#532)

[feig] improve intro + framework pages

i18n

[feih] seo: update embed JS repo link in Javascript content (#530)