[TS] Add Obj API (#5788)

* added basic code

* backup work

* got class property to work

* backup progress

* implementented fmt for creating code

* added docs for genFieldUtils

* back up work

* added base helper js func

* added union js code

* added unpackTo and base for pack

* added pack code

* added null check for packing struct list

* passes compile test

* fixed some spacing of generated functions

* added annotations for constructors

* added obj api unpack test

* tested pack to work

* merge branch

* separated js and ts test

* fixed union signature to include string

* fixed generator to support string union

* hardcoded fb builder name

* refactored struct vector creation

* work around createLong

* handle default value in constructor

* update typescript docs

* added notes about import flag

* fixed formatting stuffs

* undo TypescriptTest change

* refactored fmt

* updated generated code

* remove ignoring union_vector for js

* revert changes for .project

* revert changes for package.json

* don't generate js in ts test

* fixed android project file

* removed unused js function

* removed package-lock.json

* adjust createObjList to new signature

* changed regex to callback style

* fixed package.json

* used existing func for generating annotation

* changed ternary to !!

* added return type for lambda

* removed callback style for obj api generator

* fixed js file indentation

* removed unused header

* added tests for string only union

* handle string only union and refactor union conv func

* updated generated ts files

* renamed union conv func

* made js test create files like other languages

* removed union string only handling

* don't allow null in createObjectOffsetList

* updated generated ts code

* changed the line that triggers Windows build errors

* hopefully fix CI error

tests/namespace_test/namespace_test1_generated.ts

@@ -8,7 +8,8 @@ export enum EnumInNestedNS{
   A= 0,
   B= 1,
   C= 2
-}};
+};
+}
 
 /**
  * @constructor
@@ -100,6 +101,42 @@ static createTableInNestedNS(builder:flatbuffers.Builder, foo:number):flatbuffer
   TableInNestedNS.addFoo(builder, foo);
   return TableInNestedNS.endTableInNestedNS(builder);
 }
+
+/**
+ * @returns TableInNestedNST
+ */
+unpack(): TableInNestedNST {
+  return new TableInNestedNST(
+    this.foo()
+  );
+};
+
+/**
+ * @param TableInNestedNST _o
+ */
+unpackTo(_o: TableInNestedNST): void {
+  _o.foo = this.foo();
+};
+}
+
+export class TableInNestedNST {
+/**
+ * @constructor
+ * @param number foo
+ */
+constructor(
+  public foo: number = 0
+){};
+
+/**
+ * @param flatbuffers.Builder builder
+ * @returns flatbuffers.Offset
+ */
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return TableInNestedNS.createTableInNestedNS(builder,
+    this.foo
+  );
+};
 }
 }
 /**
@@ -178,5 +215,46 @@ static createStructInNestedNS(builder:flatbuffers.Builder, a: number, b: number)
   return builder.offset();
 };
 
+
+/**
+ * @returns StructInNestedNST
+ */
+unpack(): StructInNestedNST {
+  return new StructInNestedNST(
+    this.a(),
+    this.b()
+  );
+};
+
+/**
+ * @param StructInNestedNST _o
+ */
+unpackTo(_o: StructInNestedNST): void {
+  _o.a = this.a();
+  _o.b = this.b();
+};
+}
+
+export class StructInNestedNST {
+/**
+ * @constructor
+ * @param number a
+ * @param number b
+ */
+constructor(
+  public a: number = 0,
+  public b: number = 0
+){};
+
+/**
+ * @param flatbuffers.Builder builder
+ * @returns flatbuffers.Offset
+ */
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return StructInNestedNS.createStructInNestedNS(builder,
+    this.a,
+    this.b
+  );
+};
 }
 }