build: Add missing documentation to protected class properties

Add doc-typehints to protected class properties found by the
PropertyDocumentation sniff to improve the documentation.

Enable the sniff to avoids that new code is missing type declarations.
This is focused on documentation and does not change code.

Change-Id: I392ccdf9eee7f0e618a46ba2e15b98fdac4e7e17

Author: umherirrender

.phpcs.xml

@@ -9,7 +9,6 @@
 		<exclude name="MediaWiki.Commenting.FunctionComment.MissingParamTag" />
 		<exclude name="MediaWiki.Commenting.FunctionComment.MissingReturn" />
 		<exclude name="MediaWiki.Commenting.FunctionComment.WrongStyle" />
-		<exclude name="MediaWiki.Commenting.PropertyDocumentation.MissingDocumentationProtected" />
 		<exclude name="MediaWiki.Commenting.PropertyDocumentation.MissingDocumentationPublic" />
 		<exclude name="MediaWiki.Files.ClassMatchesFilename.NotMatch" />
 		<exclude name="MediaWiki.NamingConventions.LowerCamelFunctionsName.FunctionName" />

lessc.inc.php

@@ -17,8 +17,11 @@ class lessc {
 	public static $VERSION = Less_Version::less_version;
 
 	public $importDir = '';
+	/** @var array<string,int> */
 	protected $allParsedFiles = [];
+	/** @var array<string,callable> */
 	protected $libFunctions = [];
+	/** @var array */
 	protected $registeredVars = [];
 	/** @var string */
 	private $formatterName;

lib/Less/Exception/Chunk.php

@@ -4,10 +4,13 @@
  */
 class Less_Exception_Chunk extends Less_Exception_Parser {
 
+	/** @var int */
 	protected $parserCurrentIndex = 0;
 
+	/** @var int */
 	protected $emitFrom = 0;
 
+	/** @var int */
 	protected $input_len;
 
 	/**

lib/Less/Exception/Parser.php

@@ -19,6 +19,7 @@ class Less_Exception_Parser extends Exception {
 	 */
 	public $index;
 
+	/** @var string|null */
 	protected $input;
 
 	/**

lib/Less/Parser.php

@@ -71,6 +71,7 @@ class Less_Parser {
 	 */
 	private $env;
 
+	/** @var Less_Tree[] */
 	protected $rules = [];
 
 	/**

lib/Less/Tree/Ruleset.php

@@ -4,6 +4,7 @@
  */
 class Less_Tree_Ruleset extends Less_Tree {
 
+	/** @var array[][] */
 	protected $lookups;
 	public $_variables;
 	public $_properties;

lib/Less/Visitor.php

@@ -4,6 +4,7 @@
  */
 class Less_Visitor {
 
+	/** @var array */
 	protected $_visitFnCache = [];
 
 	public function __construct() {

test/phpunit/bootstrap.php

@@ -1,7 +1,9 @@
 <?php
 
 class LessTestCase extends PHPUnit\Framework\TestCase {
+	/** @var string */
 	protected static $fixturesDir;
+	/** @var string */
 	protected static $cacheDir;
 
 	public static function setUpBeforeClass(): void {