Update review app examples

[querkmachine]

We want to merge these changes into our main branch so that we can use them for ongoing testing and future audits, without having to reproduce them anew.

For #5085.

Changes

• Adds headings to the Tabs panels in 'Start page' example.
• Adds a second Password input to the 'Update your account details' example.
  • Each has customised ARIA labels and screen reader text unique to each input.
  • Adds validation that checks that both inputs have the same value.
• Adds 'Make a payment' example for testing Text inputs with prefixes and related validation styles.
• Modify the 'Search' example to make it appear to be the second page of results, so that the previous link is visible in Pagination.
• Remove Exit This Page component configuration from Child Maintenance example, as these were repeating the default values.

[github-actions]

📋 Stats

File sizes

File	Size
dist/govuk-frontend-development.min.css	112.52 KiB
dist/govuk-frontend-development.min.js	41.88 KiB
packages/govuk-frontend/dist/govuk/all.bundle.js	87.42 KiB
packages/govuk-frontend/dist/govuk/all.bundle.mjs	82.11 KiB
packages/govuk-frontend/dist/govuk/all.mjs	981 B
packages/govuk-frontend/dist/govuk/govuk-frontend-component.mjs	359 B
packages/govuk-frontend/dist/govuk/govuk-frontend.min.css	112.51 KiB
packages/govuk-frontend/dist/govuk/govuk-frontend.min.js	41.87 KiB
packages/govuk-frontend/dist/govuk/i18n.mjs	5.55 KiB
packages/govuk-frontend/dist/govuk/init.mjs	4.86 KiB

Modules

File	Size (bundled)	Size (minified)
all.mjs	79.24 KiB	39.84 KiB
accordion.mjs	23.5 KiB	12.39 KiB
button.mjs	5.98 KiB	2.69 KiB
character-count.mjs	22.4 KiB	9.92 KiB
checkboxes.mjs	5.83 KiB	2.83 KiB
error-summary.mjs	7.89 KiB	3.46 KiB
exit-this-page.mjs	17.1 KiB	9.26 KiB
header.mjs	4.46 KiB	2.6 KiB
notification-banner.mjs	6.26 KiB	2.62 KiB
password-input.mjs	15.15 KiB	7.25 KiB
radios.mjs	4.83 KiB	2.38 KiB
skip-link.mjs	4.39 KiB	2.18 KiB
tabs.mjs	10.13 KiB	6.11 KiB

View stats and visualisations on the review app

---

Action run for 6f10857

[owenatgov]

One pithy comment about the comment. Everything else looks grand. I don't see why we can't merge this.