Added abspath check for auto generated files

Author: ahamed

src/Discovery/ListenerDiscovery.php

@@ -220,7 +220,7 @@ public function cache(?string $path = null)
         File::put(
             $path,
             "<?php \r\n\r\n/** Auto generated by discovering the listeners. Don't edit this file manually."
-                . " */\r\n\r\nreturn "
+                . " */\r\n\r\ndefined('ABSPATH') || exit;\r\n\r\nreturn "
                 // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_var_export -- Generates a cached PHP file's return statement; this is var_export's documented use case, not debug output.
                 . var_export($this->listeners(), true) . ';'
         );

src/Discovery/PolicyDiscovery.php

@@ -197,7 +197,7 @@ public function cache(?string $path = null)
         File::put(
             $path,
             "<?php \r\n\r\n/** Auto generated by discovering the policies. Don't edit this file manually."
-                . " */\r\n\r\nreturn "
+                . " */\r\n\r\ndefined('ABSPATH') || exit;\r\n\r\nreturn "
                 // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_var_export -- Generates a cached PHP file's return statement; this is var_export's documented use case, not debug output.
                 . var_export($this->policies(), true) . ';'
         );