Permissions: Added User fallback permission condition (closes #20097)

[madsrasmussen]

This PR adds a condition to check if a verb is stored in the fallbackPermissions array on the Current User.

Fixes: #20097

The PR includes an example of how to set up the an entityUserPermission and apply the condition

[Copilot]

Pull Request Overview

This PR adds a fallback user permission condition system to the Umbraco CMS frontend, allowing permissions to be checked against a user's fallback permissions array. This addresses issue #20097 by providing a mechanism to evaluate user permissions with allOf and oneOf logic patterns.

Key Changes:

• Introduces a new UmbFallbackUserPermissionCondition class with configurable permission validation
• Adds comprehensive test coverage for the permission condition logic
• Provides working examples demonstrating entity user permissions and actions

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/Umbraco.Web.UI.Client/src/packages/user/user-permission/manifests.ts	Registers the new fallback permission condition manifest
src/Umbraco.Web.UI.Client/src/packages/user/user-permission/index.ts	Exports constants for external consumption
src/Umbraco.Web.UI.Client/src/packages/user/user-permission/fallback-permission-condition/types.ts	Defines TypeScript interfaces for the condition configuration
src/Umbraco.Web.UI.Client/src/packages/user/user-permission/fallback-permission-condition/manifests.ts	Manifest definition for the fallback permission condition
src/Umbraco.Web.UI.Client/src/packages/user/user-permission/fallback-permission-condition/fallback-user-permission.condition.ts	Core implementation of the permission checking logic
src/Umbraco.Web.UI.Client/src/packages/user/user-permission/fallback-permission-condition/fallback-user-permission.condition.test.ts	Unit tests covering all permission scenarios
src/Umbraco.Web.UI.Client/src/packages/user/user-permission/fallback-permission-condition/constants.ts	Constant definitions for the condition alias
src/Umbraco.Web.UI.Client/src/packages/user/user-permission/constants.ts	Re-exports fallback condition constants
src/Umbraco.Web.UI.Client/examples/user-permission/*	Example implementation showing how to use the new permission system

[leekelleher]

Tested out with the user-permission example, works as expected! 🚀