feat: Add more TS helper methods (#574)

* add getValue, getObjectProps

* add doesExtend, doesImplement and handle parameter and property comparisons in matches

* add isUnionOf

* update hasAnnotation test

* support array comparisons in .matches

* add hasReturn and fix bug

* add getConstructor and allow getClassProps to find props within the constructor

* add isPrivate, isReadOnly, isProtected, isPublic, hasNonNullAssertion

* refactor createTree, matches

* add more tests

* add generics support

* fix bugs

Author: Dario-DC