feat: Log GutenbergKit errors

[dcalhoun]

Log GutenbergKit (GBK) errors to the observability platform.

Related:

• https://github.com/Automattic/dotcom-forge/issues/10210
• feat: Catch and log exceptions GutenbergKit#64
• feat: Log GutenbergKit errors WordPress-Android#21621

To test:

1. Checkout this WP-iOS branch.
2. Clone the sibling GBK branch.
3. Modify Package.swift to point GutenbergKit to your local clone of the GBK repository.
4. Referencing GBK documentation, start the GBK project server and configuring environment variables. However, configure the environment variables within WordPress-iOS, not GBK's Demo app.
5. Run the WP-iOS app.
6. Introduce an intentional error in GBK (example diff below).
7. Verify the error arrives in relevant Sentry project.

Example error diff

diff --git a/src/components/editor/index.jsx b/src/components/editor/index.jsx
index 582d33c..6aa5d48 100644
--- a/src/components/editor/index.jsx
+++ b/src/components/editor/index.jsx
@@ -67,6 +67,7 @@ export default function Editor({ post, children }) {

	return (
		<div className="gutenberg-kit-editor-interface">
+			{intentionalReferenceError}
			<EditorLoadNotice className="gutenberg-kit-editor-interface__load-notice" />
			<BlockEditorProvider
				value={postBlocks}

Regression Notes

1. Potential unintended areas of impact
   Regressions in Gutenberg Mobile or Aztec editors.
2. What I did to test those areas of impact (or what existing automated tests I relied on)
   Manually tested.
3. What automated tests I added (or what prevented me from doing so)
   Deemed unnecessary for the experimental editor.

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)

[dangermattic]

	2 Warnings
⚠️	Modules/Package.swift was changed without updating its corresponding Package.resolved. Please resolve the Swift packages as appropriate to your project setup (e.g. in Xcode or by running swift package resolve).
⚠️	PR is not assigned to a milestone.

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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	pr24012-4c4325d
	Version	25.7
	Bundle ID	com.jetpack.alpha
	Commit	4c4325d
	App Center Build	jetpack-installable-builds #10438

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

[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	pr24012-4c4325d
	Version	25.7
	Bundle ID	org.wordpress.alpha
	Commit	4c4325d
	App Center Build	WPiOS - One-Offs #11406

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