feat: Added block polyfill

composer.json

@@ -33,6 +33,7 @@
     },
     "files": [
       "src/oblak-polyfill-array.php",
+      "src/oblak-polyfill-block.php",
       "src/oblak-polyfill-conditionals.php",
       "src/oblak-polyfill-filter.php",
       "src/oblak-polyfill-terms.php",

src/oblak-polyfill-block.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * Block polyfills
+ *
+ * ! This file intentionally left without namespace
+ *
+ * @package WP Polyfills
+ */
+
+if ( ! function_exists( 'deregister_all_blocks' ) ) :
+    /**
+     * Deregisters all registered blocks.
+     */
+    function deregister_all_blocks() {
+        if ( did_action( 'init' ) || 'init' !== current_action() ) {
+            _doing_it_wrong( __FUNCTION__, 'You need to call this function on init', '1.0.0' );
+            return;
+        }
+
+        array_walk(
+            array_keys( WP_Block_Type_Registry::get_instance()->get_all_registered() ),
+            static fn( $b ) => WP_Block_Type_Registry::get_instance()->unregister( $b )
+        );
+    }
+
+endif;