Update Playwright version

[m-akinc]

Pull Request

🤨 Rationale

Fixes #1544

👩‍💻 Implementation

• Added postinstall script to root package file that runs playwright install --with-deps to ensure browsers get installed.
• Bumped dependency versions of Playwright to 1.40.0 in nimble-components, nimble-blazor, and Angular workspace. They are now pinned to one version, because the root workspace package file now installs the browsers.
• Fixed two table page object functions that were incorrect.
• Added workaround (rounding cell width) for tests failing due to pulling in new version of Chrome browser (from 115.0.5790.75 to 120.0.6099.28). Six table interactive column resize tests began failing with errors like Expected 100.984375 to be 101. and Expected 74.984375 to be 75. I confirmed that this numerical imprecision is related to using fractional width units (e.g. 1fr).

We still cannot have Renovate update the Playwright dependency because of the inconsistency of versions between the npm package and the nuget. E.g. currently the latest npm package is 1.40.1, but the latest nuget is only 1.40.0, so our build will fail as it tries to find a nuget with the same version as the npm package.

🧪 Testing

Pipeline build succeeds

✅ Checklist

• I have updated the project documentation to reflect my changes or determined no changes are needed.

[m-akinc]

@msmithNI could you please buddy this change?

[msmithNI]

What's the behavior for devs locally once this goes in? Will the first npm run tdd command they run in nimble-components fail, until they do the npx playwright install? Assuming that message gets printed to the console that's probably fine, otherwise we may need to update the Contributing doc(s) to document that step.

[rajsite]

Ah dang, we all missed it but testing/ is public apis so this should have been a patch change, not a none change. @jattasNI @msmithNI @m-akinc Hopefully the change in behavior doesn't impact someone else' next release.