Update node and yarn, start on about us page

[ermish]

Resolves #294
Contributes to #295

What changed

• build fixes and upgrades
  • Fixed i18n build process
  • upgraded node to 21.0.3
  • upgraded yarn to 4.0.2
  • upgraded packages
  • fixed build
• Revamped about page with new design from Kei! ✨ (Edit: will continue in future PR)

Testing instructions

[netlify]

❌ Deploy Preview for findadoc failed.

Name	Link
🔨 Latest commit	06dbbf2
🔍 Latest deploy log	https://app.netlify.com/sites/findadoc/deploys/656de206ac34370008ac460f

[socket-security]

New, updated, and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
@apollo/client	3.8.8	network	+14	6.78 MB	apollo-bot
cypress	10.11.0...13.6.0	environment	+6/-3	11.6 MB	cypress-npm-publisher
@pinia/nuxt	0.4.11...0.5.1	None	+2/-2	34.4 MB	posva
@typescript-eslint/eslint-plugin	5.62.0...6.13.1	None	+9/-12	36.7 MB	jameshenry
@typescript-eslint/parser	5.62.0...6.13.1	None	+6/-6	33.7 MB	jameshenry
jsdom	21.1.2...23.0.1	None	+8/-12	3.36 MB	domenic
typescript	4.9.5...5.3.2	None	+0/-0	32 MB	typescript-bot

🚮 Removed packages: [email protected]