feat: use dark footer everywhere

[JoeCap08055]

Description

Update all routes to use newdark (blue #14313F background) footer as per design

• Closes #50

Screenshot(s)

Type of change

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 and run locally
2. Go to "About" and "Dev Docs" links
3. See that footer is dark blue and lines up with content

Checklist:

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

[github-actions[bot]]

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Preview URL: https://www.frequency.xyz/_pr/63/ Commit: e8e1c4d