[FEATURE] NFTPort API Addition - Upload Metadata Directory To IPFS

[thepeanutgalleryandco]

Summary

Add a new script for collection contracts that will allow users to upload a metadata json directory instead of uploading the files one by one.

Basic example

Take the build/json directory, then add all the file paths into an array and then upload that array of files to IPFS.

Motivation

This will allow users to make use of the code base for image generation as well as uploads in an automated way, while handling the one off APIs via the NFTPort website itself.

[thepeanutgalleryandco]

Added a new script uploadMetas_directory.js script under the utils/nftport/ directory. This script will allow users to upload their metadata json folders to IPFS in a single API call instead of individual API calls. This is needed when users want to make use of NFTPort's new collection contracts.