[WIP] Move component attributes into `govukAttributes()`

[colinrotherham]

Work in progress PR to move key attributes into govukAttributes()

Due to improved checks for null, undefined or empty "" this closes https://github.com/alphagov/govuk-frontend/issues/4669

To help discuss, I've picked these components so far:

• Button
• ~Character count~ https://github.com/alphagov/govuk-frontend/pull/4566/commits/b93ef7bce5c7f47fe4318698e173b4c342ae599a
• Input

[github-actions[bot]]

:clipboard: Stats

File sizes

File	Size
dist/govuk-frontend-development.min.css	112.86 KiB
dist/govuk-frontend-development.min.js	38.53 KiB
packages/govuk-frontend/dist/govuk/all.bundle.js	78.63 KiB
packages/govuk-frontend/dist/govuk/all.bundle.mjs	73.89 KiB
packages/govuk-frontend/dist/govuk/all.mjs	3.86 KiB
packages/govuk-frontend/dist/govuk/govuk-frontend-component.mjs	359 B
packages/govuk-frontend/dist/govuk/govuk-frontend.min.css	112.85 KiB
packages/govuk-frontend/dist/govuk/govuk-frontend.min.js	38.51 KiB
packages/govuk-frontend/dist/govuk/i18n.mjs	5.38 KiB

Modules

File	Size (bundled)	Size (minified)
all.mjs	70.21 KiB	36.78 KiB
accordion.mjs	21.67 KiB	12.42 KiB
button.mjs	4.67 KiB	2.16 KiB
character-count.mjs	21.24 KiB	9.45 KiB
checkboxes.mjs	5.83 KiB	2.83 KiB
error-summary.mjs	6.57 KiB	2.92 KiB
exit-this-page.mjs	16.04 KiB	8.86 KiB
header.mjs	4.46 KiB	2.6 KiB
notification-banner.mjs	4.93 KiB	2.09 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

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Action run for 2affb93ad6f55016257183fdf4703ab8e1314491