feat: backfill Settings and Example modules

[justlevine]

What

Adds example modules, and reorganizes the tests to follow the namespaces

Why

Backfilling usage examples.

Related Issue(s):

How

Testing Instructions

Screenshots

Additional Info

Checklist

• I have read the Contribution Guidelines.
• My PR title is descriptive and follows the conventional commit message format.
• My code passes all lints (PHPCS, PHPStan, ESLint, etc.).
• My code has detailed inline documentation.
• My code has tests that cover the changes I made.
• I have updated the project documentation as needed.

[Copilot]

Pull request overview

This PR backfills “Settings” and “Example” modules into the plugin skeleton, including a basic admin settings screen/template and corresponding unit tests organized by module namespaces.

Changes:

• Adds Modules\Example (CPT, taxonomy, meta, REST controller) and Modules\Settings (settings registration + admin screen).
• Updates Core\Assets to separate frontend/admin/editor asset registration hooks.
• Reorganizes/adds PHPUnit tests to mirror module namespaces and updates development/docs scaffolding notes.

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
tests/php/Unit/Modules/Settings/SettingsTest.php	Adds unit tests for settings registration and option helper.
tests/php/Unit/Modules/ExampleTest.php	Adds a smoke test for module hook registration.
tests/php/Unit/Modules/Example/Example_TaxonomyTest.php	Adds unit tests for taxonomy registration and associations.
tests/php/Unit/Modules/Example/Example_REST_ControllerTest.php	Adds unit tests for REST controller response and permissions.
tests/php/Unit/Modules/Example/Example_Post_Type_MetaTest.php	Adds unit tests for meta registration, sanitization, and REST updates.
tests/php/Unit/Modules/Example/Example_Post_TypeTest.php	Adds unit tests for CPT registration and taxonomy association.
tests/php/Unit/Modules/CLITest.php	Moves CLI tests into the Unit\Modules namespace.
tests/php/Unit/Modules/CLI/HealthcheckTest.php	Updates namespace/package tags to match module structure.
tests/php/Unit/Modules/Admin/Admin_ScreenTest.php	Adds unit tests for the settings admin screen/menu integration.
tests/php/Unit/Core/TemplatesTest.php	Moves Templates tests into the Unit\Core namespace.
tests/php/Unit/Core/AssetsTest.php	Updates Assets tests for new admin/editor registration methods.
tests/js/setup.ts	Removes unnecessary Jest mocks from setup.
templates/admin-screen.php	Adds the admin screen template markup.
plugin-skeleton-d.php	Removes unused basename constant.
inc/Modules/Settings/Settings.php	Implements settings registration and an option helper.
inc/Modules/Settings/Admin_Screen.php	Implements admin settings screen + plugin action link + script enqueue.
inc/Modules/Example/Example_Taxonomy.php	Adds an example taxonomy implementation.
inc/Modules/Example/Example_REST_Controller.php	Adds an example REST controller implementation.
inc/Modules/Example/Example_Post_Type_Meta.php	Adds example post meta registration with REST exposure.
inc/Modules/Example/Example_Post_Type.php	Adds an example CPT implementation.
inc/Modules/Example.php	Adds the Example module bootstrap/registrable list.
inc/Main.php	Registers the new modules in the plugin bootstrap.
inc/Core/Assets.php	Splits asset registration into frontend/admin/editor and updates hooks.
docs/DEVELOPMENT.md	Updates module directory layout and wp-env command examples.
README.md	Updates scaffolding/todo documentation to reflect new examples.

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