Replace parsing and test libraries

* WIP

* WIP

* wip

* WIP

* Several fixes

* Tests wip port to playwright

* WIP

* Fix more tests

* Serialization tests fixed

* Several fixes for tests

* Input options types

* Type adjustments

* Fix object reference parser

* Tests fixes

* More tests fixes

tests/resources/EntityF.js

@@ -0,0 +1,27 @@
+import Grammar from "../../js/serialization/Grammar.js"
+import IEntity from "../../js/entity/IEntity.js"
+import Union from "../../js/entity/Union.js"
+
+export default class EntityF extends IEntity {
+
+    static lookbehind = new Union("Foo", "Bar")
+    static attributes = {
+        ...super.attributes,
+        arg1: {
+            type: Number,
+        },
+        arg2: {
+            type: String,
+        },
+    }
+
+    static grammar = this.createGrammar()
+
+    static createGrammar() {
+        return Grammar.createEntityGrammar(this, false)
+    }
+
+    constructor(values = {}) {
+        super(values)
+    }
+}