Split grammar (#15)

* Move grammar parsers to entity classes

* Fix includes

* Fix Entity5 test

* Small detail

* Fix unknown keys entities

* Persistent grammar objects

* Fix grammar

* Grammar from variable

js/entity/SimpleSerializationVectorEntity.js

@@ -1,4 +1,25 @@
+import Grammar from "../serialization/Grammar.js"
+import Parsimmon from "parsimmon"
 import VectorEntity from "./VectorEntity.js"
 
 export default class SimpleSerializationVectorEntity extends VectorEntity {
+
+    static grammar = this.createGrammar()
+
+    static createGrammar() {
+        return Parsimmon.alt(
+            Parsimmon.seq(
+                Grammar.number,
+                Grammar.commaSeparation,
+                Grammar.number,
+                Grammar.commaSeparation,
+                Grammar.number,
+            ).map(([x, _1, y, _3, z]) => new this({
+                X: x,
+                Y: y,
+                Z: z,
+            })),
+            VectorEntity.createGrammar()
+        )
+    }
 }