[Task] Documentation link in readme should be full url to github

[zinoadidi]

Describe the bug

when package is deployed to npm (https://www.npmjs.com/package/thenewboston), under documentation section, if the user clicks the link to documentation, it takes them to a page that doesn't exist

To Reproduce
Steps to reproduce the behavior:

Expected behavior

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Additional context
changes should be done in readme.md

** Pull Requests **
All Pull Request should be made against development branch read contributors guide for more information about contributing

[Samueloyeks]

I will work on this