feat: swap in Footer component from @frequency-chain/style-guide

[JoeCap08055]

• also fix tailwindow.config.js to use 'extend' property, else Tailwind classes from the package don't come through always

• Closes Update the footer with the one from the style guide #36

Screenshot(s)

Desktop:

Mobile/small screen:

Please delete options that are not relevant.

• Content Change (Required approval in Slack: #frequency-xyz and remember that changes along the way trigger
  re-approval.)
  • Approved HE (Required for technical wording)
  • Approved CM
  • Approved UO

How to Test?

1. Pull branch
2. Run npm run dev -- --open
3. Visually verify that the footer matches the screenshots

Checklist:

• I have performed a self-review of my code
• I have commented my code & PR, particularly in hard-to-understand areas
• I have checked at all the breakpoints to make sure it works on all screen sizes

[claireolmstead]

Looks great! Creating a follow up issue to add the extends and content additions in the readme of the styleguide. Ready to go once the checks are passing!

[enddynayn]

👍 LGTM

[github-actions]

🚀 Preview deployment for this PR is going up! Remember you might need to hard refresh to get the new content.

Preview URL: https://www.frequency.xyz/_pr/43/
Commit: cb89025