Remove WordPressKitObjCUtils

[kean]

This change is a prerequisite for #25392. I need to use GutenbergExcerptGenerator from WordPressShared in WordPressKitModels. Unfortunately, it results in multiple ObjC-related compiler errors like these:

Both WordPressSharedObjC and WordPressKitObjC have a public header named WPMapFilterReduce.h. Now that WordPressKitObjC transitively depends on WordPressSharedObjC (via WordPressKitModels → WordPressShared → WordPressSharedObjC), the compiler resolves #import "WPMapFilterReduce.h" to WordPressSharedObjC's version — which defines WPMapBlock/WPFilterBlock but not WPKitMapBlock/WPKitFilterBlock.

Changes

• Add WordPressShared dependency to WordPressKitModels and WordPressKitObjC
• Remove WordPressKitObjCUtils
• Update WordPressKit to use APIs from WordPressShared instead of the ones that were removed
• Add explicit WordPressKit target to Package.swift so it would auto-create a scheme

[dangermattic]

	3 Warnings
⚠️	Modules/Package.swift was changed without updating its corresponding Package.resolved. If the change includes adding, removing, or editing a dependency please resolve the Swift packages as appropriate to your project setup (e.g. in Xcode or by running swift package resolve). If the change to the Package.swift did not modify dependencies, ignoring this warning should be safe, but we recommend double checking and running the package resolution just in case. .
⚠️	This PR is larger than 500 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.
⚠️	This PR is assigned to the milestone 26.8. This milestone is due in less than 4 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[wpmobilebot]

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

	App Name	WordPress
	Configuration	Release-Alpha
	Build Number	31561
	Version	PR #25400
	Bundle ID	org.wordpress.alpha
	Commit	e7babf9
	Installation URL	57v9f9kc85ilg

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

	App Name	Jetpack
	Configuration	Release-Alpha
	Build Number	31561
	Version	PR #25400
	Bundle ID	com.jetpack.alpha
	Commit	e7babf9
	Installation URL	67bnl1638lr8o

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[wpmobilebot]

🤖 Build Failure Analysis

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[kean]

These may no longer be needed. Will look into removing it in separate PRs.

[crazytonyli]

What do you think about moving or duplicating GutenbergExcerptGenerator in WPKit? I'm not sure we should reverse the dependency between WPShared and WPKit.

[kean]

What do you think about moving or duplicating GutenbergExcerptGenerator in WPKit? I'm not sure we should reverse the dependency between WPShared and WPKit.

To add some context, WordPressKit originally had a dependency on WordPressShared. When WordPressShared was moved into wpios, we duplicated its code within WordPressKit as a practical workaround. Now that both modules live in the same repo again, it seems like a good opportunity to remove that duplication and restore the original dependency.

To address the concern - WordPressShared doesn't depend on WordPressKit. It's a small, low-level module that many other modules already rely on, so this would align with the existing dependency direction. Hope that clarifies things. Please, let me know if you have other concerns.