Block Editor: Add the initial set of block patterns.

Included patterns:

text-two-columns
two-buttons
two-images
text-two-columns-with-images
text-three-columns-buttons
large-header
large-header-paragraph
three-buttons
quote
testimonials

Props mcsf, nrqsnchz.
See #50550.


git-svn-id: https://develop.svn.wordpress.org/trunk@48334 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/block-patterns/two-buttons.php

@@ -0,0 +1,13 @@
+<?php
+/**
+ * Two Buttons block pattern.
+ *
+ * @package WordPress
+ */
+
+return array(
+	'title'         => __( 'Two buttons' ),
+	'content'       => "<!-- wp:buttons {\"align\":\"center\"} -->\n<div class=\"wp-block-buttons aligncenter\"><!-- wp:button {\"backgroundColor\":\"very-dark-gray\",\"borderRadius\":0} -->\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background has-very-dark-gray-background-color no-border-radius\">" . __( 'Button One' ) . "</a></div>\n<!-- /wp:button -->\n\n<!-- wp:button {\"textColor\":\"very-dark-gray\",\"borderRadius\":0,\"className\":\"is-style-outline\"} -->\n<div class=\"wp-block-button is-style-outline\"><a class=\"wp-block-button__link has-text-color has-very-dark-gray-color no-border-radius\">" . __( 'Button Two' ) . "</a></div>\n<!-- /wp:button --></div>\n<!-- /wp:buttons -->",
+	'viewportWidth' => 500,
+	'categories'    => array( 'buttons' ),
+);