Add doc blocs in ::config methods

[roxblnfk]

For example here:

schema-provider/src/FromFilesSchemaProvider.php

Lines 45 to 49 in d6e800d

	/**
	* Create a configuration array for the {@see self::withConfig()} method.
	* @param array<non-empty-string> $files
	*/
	public static function config(array $files, bool $strict = false): array