[SPIKE] Run the GOV.UK Prototype Kit locally

[colinrotherham]

This PR creates and installs an instance of GOV.UK Prototype Kit locally as part of #3759

After install, we use npm link to replace GOV.UK Frontend with ./packages/govuk-frontend

I'd like to spike using Percy to:

1. Start the prototype
2. Screenshot the prototype home page
3. Screenshot the Manage your prototype page

This spots issues like missing fonts, assets etc

[colinrotherham]

Still seeing the following in the browser development console:

[Error] Failed to load resource: too many HTTP redirects (http://localhost:3000/manage-prototype/dependencies/govuk-frontend/govuk/assets/fonts/bold-b542beb274-v2.woff2, line 0)
[Error] Failed to load resource: too many HTTP redirects (http://localhost:3000/manage-prototype/dependencies/govuk-frontend/govuk/assets/fonts/light-94a07e06a1-v2.woff2, line 0)
[Error] Failed to load resource: too many HTTP redirects (http://localhost:3000/manage-prototype/dependencies/govuk-frontend/govuk/assets/images/govuk-crest-2x.png, line 0)
[Error] Failed to load resource: too many HTTP redirects (http://localhost:3000/manage-prototype/dependencies/govuk-frontend/govuk/assets/fonts/bold-affa96571d-v2.woff, line 0)
[Error] Failed to load resource: too many HTTP redirects (http://localhost:3000/manage-prototype/dependencies/govuk-frontend/govuk/assets/fonts/light-f591b13f7d-v2.woff, line 0)

This is with cherry picked commit 89166c9 from @romaricpascal

[colinrotherham]

Possibly a missed asset path on the frontend-v5-compatibility branch as shown here:

https://github.com/alphagov/govuk-prototype-kit/blob/84cd3eeb41051cbd784def9b4175d4b873272534/lib/nunjucks/views/manage-prototype/layout.njk#L1

[github-actions]

📋 Stats

File sizes

File	Size
dist/govuk-frontend-4.6.0.min.css	118.07 KiB
dist/govuk-frontend-4.6.0.min.js	47.1 KiB
dist/govuk-frontend-ie8-4.6.0.min.css	79.27 KiB
packages/govuk-frontend/dist/govuk/all.bundle.js	77.65 KiB
packages/govuk-frontend/dist/govuk/all.bundle.mjs	72.94 KiB
packages/govuk-frontend/dist/govuk/all.mjs	3.84 KiB
packages/govuk-frontend/dist/govuk/govuk-frontend-component.mjs	359 B
packages/govuk-frontend/dist/govuk/govuk-frontend.min.css	120.49 KiB
packages/govuk-frontend/dist/govuk/govuk-frontend.min.js	37.89 KiB
packages/govuk-frontend/dist/govuk/i18n.mjs	5.83 KiB

Modules

File	Size
all.mjs	69.04 KiB
components/accordion/accordion.mjs	21.91 KiB
components/button/button.mjs	4.71 KiB
components/character-count/character-count.mjs	22.03 KiB
components/checkboxes/checkboxes.mjs	5.69 KiB
components/error-summary/error-summary.mjs	6.01 KiB
components/exit-this-page/exit-this-page.mjs	16.61 KiB
components/header/header.mjs	3.84 KiB
components/notification-banner/notification-banner.mjs	4.55 KiB
components/radios/radios.mjs	4.68 KiB
components/skip-link/skip-link.mjs	3.74 KiB
components/tabs/tabs.mjs	9.32 KiB

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