[FEATURE] Pinata Upload Files API Call

[thepeanutgalleryandco]

Summary

Add API calls from Pinata for users to make use of when they need to upload images or metadata files.

Basic example

Use a upload-images.js and upload-metas.js script to upload files to Pinata and receive a single CID back for each of the uploads.

Motivation

This will allow users to upload directly from their machines instead of uploading via the Pinata interface.

[thepeanutgalleryandco]

Since NFTPort is allowing for metadata directory upload, I am closing this feature. Can be re-opened if needed in the future.