Change UmbPropertyValueChangeEvent to UmbChangeEvent and updates wrong import paths

[iOvergaard]

Description

• Corrects usages of UmbPropertyValueChangeEvent and converts them into UmbChangeEvent with updated code samples
• Updates import paths throughout code examples with known changes in V15
• Updates code examples with updated best practices
• Adds lineNumbers="true" and overflow="wrap" on large code sections

Type of suggestion

• Typo/grammar fix
• Updated outdated content
• New content
• Updates related to a new version
• Other

Product & version (if relevant)

15

Deadline (if relevant)

ASAP

[Copilot]

Pull Request Overview

This PR updates code examples and documentation to reflect the removal of UmbPropertyValueChangeEvent in favor of UmbChangeEvent, aligning import paths and coding practices with the latest V15 guidelines. Key changes include the following:

• Replacing event dispatches from UmbPropertyValueChangeEvent to UmbChangeEvent.
• Updating import paths for property editors and related modules.
• Adding attributes (lineNumbers and overflow) to code block examples for improved readability.

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
15/umbraco-forms/developer/extending/adding-a-fieldtype.md	Updated event dispatch and import path changes for property editors.
15/umbraco-cms/tutorials/creating-a-property-editor/integrating-context-with-a-property-editor.md	Revised private field naming and updated event dispatch usages.
15/umbraco-cms/tutorials/creating-a-property-editor/adding-configuration-to-a-property-editor.md	Similar updates to event dispatch and import paths.
15/umbraco-cms/tutorials/creating-a-property-editor/README.md	Documentation fixes including TypeScript spelling and code block formatting tweaks.
15/umbraco-cms/customizing/property-editors/composition/property-editor-ui.md	Adjusted code examples to use the new event and import standards.
Other files	Minor consistency and formatting updates across various tutorials and extension examples.

Comments suppressed due to low confidence (3)

15/umbraco-forms/developer/extending/adding-a-fieldtype.md:282

• Ensure that any event listeners or subscribers, previously listening for UmbPropertyValueChangeEvent, are updated to handle the new UmbChangeEvent accordingly.

this.dispatchEvent(new UmbChangeEvent());

15/umbraco-cms/tutorials/creating-a-property-editor/integrating-context-with-a-property-editor.md:41

• [nitpick] Confirm that the adoption of private field naming using '#' aligns with your project's coding standards and is fully supported by your build configuration.

#notificationContext?: UmbNotificationContext;

15/umbraco-cms/tutorials/creating-a-property-editor/README.md:19

• [nitpick] Ensure consistent usage of quotation marks in code examples throughout the documentation, as the diff reflects a mix of single and double quotes.

This tutorial uses TypeScript and Lit with Umbraco, It is expected that your package is already [set up to use TypeScript and Lit](../../customizing/development-flow/vite-package-setup.md).

[iOvergaard]

@leekelleher, could I ask you to verify the code example changes in this PR, please?

@sofietoft, this PR also contains new content, so would you review that, please?

[leekelleher]

I'm happy with the code snippet updates. 🚀

[sofietoft]

Changes look great 💪
Appreciate the attention to detail! ⭐