[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/monster_test.ts

@@ -9,6 +9,7 @@ export { Race } from './my-game/example/race';
 export { Referrable, ReferrableT } from './my-game/example/referrable';
 export { Stat, StatT } from './my-game/example/stat';
 export { StructOfStructs, StructOfStructsT } from './my-game/example/struct-of-structs';
+export { StructOfStructsOfStructs, StructOfStructsOfStructsT } from './my-game/example/struct-of-structs-of-structs';
 export { Test, TestT } from './my-game/example/test';
 export { TestSimpleTableWithEnum, TestSimpleTableWithEnumT } from './my-game/example/test-simple-table-with-enum';
 export { TypeAliases, TypeAliasesT } from './my-game/example/type-aliases';