Write readme (#1)

* added incomplete documentation for teh exported functions

* added heading for each function

* added links to reference

* added copyright notice

* added example for json-file->scm

* better indentation of putput

* added more code adn more examples to readme

* added name for scm file

* added exception handling content

* explains exception handling

* descriptions and examples added for hooks

* example with hooks

* added conversion format

* add git clone step to installation

* fixed spelling - clone

* ded doc for scm->json functions

* added table of contents

Co-authored-by: आयुष झा <[email protected]>