Automate GitHub Release

[domoscargin]

What

resolves #5608

Automates our GitHub releases through a workflow_dispatch GitHub Actions workflow.

The workflow creates a GitHub tag for the version in the package.json file. It also creates a zip file, and generates release notes from the CHANGELOG, before creating a release.

If the tag or the release already exist, the job will fail, and these will need to be manually deleted via the UI.

Notes

It's possible to skip the tag creation step, since gh release automatically creates a tag for the release if it doesn't exist. This PR keeps this step so that the tags/release are fully consistent with every previous release tag on the repo.

[github-actions]

📋 Stats

File sizes

File	Size
dist/govuk-frontend-development.min.css	118.52 KiB
dist/govuk-frontend-development.min.js	42.7 KiB
packages/govuk-frontend/dist/govuk/all.bundle.js	92.81 KiB
packages/govuk-frontend/dist/govuk/all.bundle.mjs	87.12 KiB
packages/govuk-frontend/dist/govuk/all.mjs	1.25 KiB
packages/govuk-frontend/dist/govuk/govuk-frontend-component.mjs	1.74 KiB
packages/govuk-frontend/dist/govuk/govuk-frontend.min.css	118.51 KiB
packages/govuk-frontend/dist/govuk/govuk-frontend.min.js	42.69 KiB
packages/govuk-frontend/dist/govuk/i18n.mjs	5.55 KiB
packages/govuk-frontend/dist/govuk/init.mjs	7.13 KiB

Modules

File	Size (bundled)	Size (minified)
all.mjs	82.57 KiB	40.4 KiB
accordion.mjs	26.58 KiB	13.41 KiB
button.mjs	9.09 KiB	3.78 KiB
character-count.mjs	25.39 KiB	10.9 KiB
checkboxes.mjs	7.81 KiB	3.42 KiB
error-summary.mjs	10.99 KiB	4.54 KiB
exit-this-page.mjs	20.2 KiB	10.34 KiB
header.mjs	6.46 KiB	3.22 KiB
notification-banner.mjs	9.35 KiB	3.7 KiB
password-input.mjs	18.24 KiB	8.33 KiB
radios.mjs	6.81 KiB	2.98 KiB
service-navigation.mjs	6.44 KiB	3.26 KiB
skip-link.mjs	6.4 KiB	2.76 KiB
tabs.mjs	12.04 KiB	6.67 KiB

View stats and visualisations on the review app

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Action run for 1509417

[owenatgov]

#5635 has been updated so this just needs a rebase and then we can review properly.

[owenatgov]

One non-blocking comment. I don't have anything to add, this looks grand to me!

I don't know if we want to merge now or wait for #5635 to be mergable and then merge this into main. Up to you.