Release GOV.UK Frontend 3.14.0

[vanitabarrett]

What

Do a feature release of GOV.UK Frontend before we start work on v4.

Why

We were notified about a high priority issue with the panel component just after releasing 3.13.1. We don't want to wait until v4.0.0 to release this fix. We've also worked on a few new features since 3.13.1 too, so we can release them at the same time.

Further detail

We're using this release as an opportunity to test releasing changes from a support branch (e.g: support/3.x). This is to give us the confidence when working on breaking releases that we can still publish urgent fix releases even if we've merged changes into main.

This will have an impact on how we do this release. We will be following these draft release steps. Because the changes are already merged into main, we essentially need to duplicate those changes into new PRs against the support/3.x branch. In a more realistic scenario, we'd have made the changes against the support branch first, and then copied them onto main afterwards.

Support branch PRs

• Add text-align override classes #2368
• Allow govuk-spacing to output negative spacing #2367
• Prevent panel text overflowing when zoomed in on mobile #2366

Who needs to know about this

Developers, Content Design, Tech Writer

Done when

• Draft comms for v3.14.0 release #2363
• Create release notes for GOV.UK Frontend v3.14.0 (Feature release) #2364
• Create release notes for GOV.UK Prototype Kit v9.15.0 govuk-prototype-kit#1096
• Release v3.14.0 of GOV.UK Frontend to npm 🚀 #2365
• Update the Design System to use GOV.UK Frontend v3.14.0 govuk-design-system#1898
• Update Frontend Docs to to use GOV.UK Frontend v3.14.0  govuk-frontend-docs#148
• Update the Prototype Kit to use GOV.UK Frontend v3.14.0 govuk-prototype-kit#1097
• Release GOV.UK Prototype Kit v9.15.0 govuk-prototype-kit#1098