Validate template option for grid fields

[Rafikooo]

Initial error:

The error message did not clearly indicate what was wrong.

The issue was related to grid configuration merging.

In Sylius, we have:

sylius_grid:
    grids:
        fields:
            email:
                type: twig
                label: sylius.ui.email
                sortable: ~
                options:
                    template: "@SyliusAdmin/shared/grid/field/name.html.twig"

and in some end app:

sylius_grid:
    grids:
        fields:
            email:
                type: string
                label: sylius.ui.email
                sortable: ~
                position: 4

After merging, the type was set to string, but the template option from the base configuration remained, causing the application to break.

This PR introduces validation to prevent similar issues in the future, saving users from hours of debugging.

[GSadee]

Suggested change

	/**
	* @test
	*/
	/** @test */

[loic425]

You can also use the PHP Attribute :)

[GSadee]

Suggested change

	public function it_throws_exception_when_field_template_is_used_with_non_twig_type(): void
	public function it_throws_an_exception_when_field_template_is_used_with_non_twig_type(): void

[NoResponseMate]

This seems like an overreach that can plausibly cause conflicts with custom types.
Wouldn't it be better to reset the previous options once the type changes, we'd probably need to inject the logic somewhere inside the config merging mechanism though.