Implement a new site plugins list

[crazytonyli]

Note

This PR is built on top of #24014.

The new screen follows the pattern established in the self-hosted site User Management. An application password is required to access this feature (when it's turned on).

Here is a recording of this screen:

plugins.mp4

As part of this PR, I made a small change to CachedAsyncImage. It now accepts an interim object (ImageURLResolver), which eventually produces an image URL. The icons in the plugin list is not part of the plugins response. Their url has to be loaded separately.

I could spin up separate tasks to load them and then refresh the plugins list after they are loaded. But I thought making them part of the image loading process might be more straightforward in terms of managing the loading tasks: SwiftUI would take care of them.

Of course, that comes with a downside: All URLs are put into an async call, which is definitely slower than just using them directly in the calling thread. But I thought that's an okay compromise to make.

Regression Notes

1. Potential unintended areas of impact

2. What I did to test those areas of impact (or what existing automated tests I relied on)

3. What automated tests I added (or what prevented me from doing so)

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Testing checklist:

• WordPress.com sites and self-hosted Jetpack sites.
• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• VoiceOver.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• iPhone and iPad.
• Multi-tasking: Split view and Slide over. (iPad)

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Alpha by scanning the QR code below to install the corresponding build.

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr24023-9056952
	Version	25.7
	Bundle ID	org.wordpress.alpha
	Commit	9056952
	App Center Build	WPiOS - One-Offs #11423

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[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr24023-9056952
	Version	25.7
	Bundle ID	com.jetpack.alpha
	Commit	9056952
	App Center Build	jetpack-installable-builds #10456

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.