Allow using dot separated field names for Identity::get()

[ADmad]

No description provided.

[Copilot]

Pull request overview

This pull request enhances the Identity::get() method to support dot-separated field names for accessing nested data, aligning its functionality with the existing IdentityHelper::get() pattern. The method signature is updated to make the field parameter optional, allowing retrieval of the entire identity data when called without arguments.

Changes:

• Modified Identity::get() to accept nullable field parameter and use Hash::get() for dot notation support
• Added cakephp/utility package as a required dependency for the Hash utility class
• Added comprehensive test coverage for the new dot notation functionality

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/Identity.php	Updated get() method signature to accept optional field parameter and replaced direct array access with Hash::get() for dot notation support
tests/TestCase/IdentityTest.php	Added new test method testGet() to verify dot notation functionality with Entity objects
composer.json	Added cakephp/utility ^5.0 as a required dependency

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[Copilot]

@ADmad I've opened a new pull request, #769, to work on those changes. Once the pull request is ready, I'll request review from you.