Split replace/delete original from response type

[SiebeVE]

Add ability to delete/replace original and change the response type.

This change isn't backwards compatible and should be considered a major change.

[jlindblom-godaddy]

The code looks good, but I don't understand the reason for it. Can you explain why it's necessary to split them? What have I overlooked?

[SiebeVE]

It isn't possible if you want to add the directive replace_original and delete_original, you can only add one because it is stored in the same directive variable.

slack-php-block-kit/src/Surfaces/Message.php

Lines 22 to 23 in c577977

	#[FauxProperty('response_type', 'replace_original', 'delete_original')]
	public ?MessageDirective $directive;

This PR changes the behaviour and allows you to send replace_original and delete_original.
(Required if you want to change an ephemeral message with an in channel message)

[SiebeVE]

See #19