[TS] Fix generation of struct members in object api (#7148)

* Fix C/C++ Create<Type>Direct with sorted vectors

If a struct has a key the vector has to be sorted. To sort the vector
you can't use "const".

* Changes due to code review

* Improve code readability

* Add generate of JSON schema to string to lib

* option indent_step is supported

* Remove unused variables

* Fix break in test

* Fix style to be consistent with rest of the code

* [TS] Fix reserved words as arguments (#6955)

* [TS] Fix generation of reserved words in object api (#7106)

* [TS] Fix generation of object api

* [TS] Fix MakeCamel -> ConvertCase

* [TS] Add test for struct of struct of struct

* Update generated files

* Add missing files

* [TS] Fix query of null/undefined fields in object api

tests/MyGame/Example/StructOfStructsOfStructsT.java

@@ -0,0 +1,22 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+package MyGame.Example;
+
+import java.nio.*;
+import java.lang.*;
+import java.util.*;
+import com.google.flatbuffers.*;
+
+public class StructOfStructsOfStructsT {
+  private MyGame.Example.StructOfStructsT a;
+
+  public MyGame.Example.StructOfStructsT getA() { return a; }
+
+  public void setA(MyGame.Example.StructOfStructsT a) { this.a = a; }
+
+
+  public StructOfStructsOfStructsT() {
+    this.a = new MyGame.Example.StructOfStructsT();
+  }
+}
+