Style engine: update type for getCSSValueFromRawStyle

[ramonjd]

What?

Follow up to #64490

Use a generic type parameter StyleValue to describe argument and return value of getCSSValueFromRawStyle().

Props to @kevin940726

Why?

Avoid the use of any and describe better what the function expects.

How?

By default, StyleValue is set to string. This allows the function to be flexible with the type of styleValue, but it defaults to handling strings.

getCSSValueFromRawStyle() takes one parameter, styleValue, which is of type StyleValue = string. This means it can be any type, but the function is primarily designed to work with strings.

getCSSValueFromRawStyle() returns a value of the same type StyleValue. This ensures that its output type matches its input type.

Testing Instructions

The CI should build, all tests should pass.

[github-actions]

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Co-authored-by: ramonjd <[email protected]>
Co-authored-by: kevin940726 <[email protected]>

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[kevin940726]

LGTM 👍

[github-actions]

Flaky tests detected in 44de688.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/10399358112
📝 Reported issues:

• [Flaky Test] Sorting #64430 in /test/e2e/specs/site-editor/new-templates-list.spec.js