Supply frontend with endpoints and nonce

The UI needs to fetch the scores for SEO and readability
And those routes are protected by a nonce we need to provide
TODO: refactor to onion architecture

src/dashboard/application/configuration/dashboard-configuration.php

@@ -82,6 +82,11 @@ public function get_configuration(): array {
 					Keyphrase_Analysis::NAME,
 				]
 			)->to_array(),
+			'endpoints'               => [
+				'seoScores'         => \rest_url( \Yoast\WP\SEO\Main::API_V1_NAMESPACE . \Yoast\WP\SEO\Dashboard\User_Interface\Scores\SEO_Scores_Route::ROUTE_PREFIX ),
+				'readabilityScores' => \rest_url( \Yoast\WP\SEO\Main::API_V1_NAMESPACE . \Yoast\WP\SEO\Dashboard\User_Interface\Scores\Readability_Scores_Route::ROUTE_PREFIX ),
+			],
+			'nonce'                   => \wp_create_nonce( 'wp_rest' ),
 		];
 	}
 }