tests: setup playwright

[louis-bompart]

Initial setup of playwright

See #4033 for a test demoing the "result" and good practice.

KIT-3188

[github-actions]

Pull Request Report

PR Title

❌ Title should follow the conventional commit spec:
<type>(optional scope): <description>

Example: feat(headless): add result-list controller

Live demo links

• Storybook

• Playwright report

Bundle Size

File	Old (kb)	New (kb)	Change (%)
case-assist	202.8	202.8	0
commerce	285.9	285.9	0
search	367.5	367.5	0
insight	347.8	347.8	0
product-listing	262.3	262.3	0
product-recommendation	171.9	171.9	0
recommendation	215.8	215.8	0
ssr	360.3	360.3	0

SSR Progress

Use case	SSR (#)	CSR (#)	Progress (%)
search	39	44	89
recommendation	0	4	0
product-recommendation	0	10	0
product-listing	0	13	0
case-assist	0	6	0
insight	0	27	0
commerce	0	7	0

Detailed logs

search : buildInteractiveResult
search : buildInteractiveInstantResult
search : buildInteractiveRecentResult
search : buildInteractiveCitation
search : buildGeneratedAnswer
recommendation : missing SSR support
product-recommendation : missing SSR support
product-listing : missing SSR support
case-assist : missing SSR support
insight : missing SSR support
commerce : missing SSR support