Starting files for woocommerce twinfield integration. Requires metabox class to allow async formbuilder submissions
start of the admin javascript for ajax request
start of the sync class
start of the meta box class
update to get the WC_Product class of an item
addition of admin init method and action hook. Includes to the 2 new classes. Addition of helper plugin folder/file methods
invoice metabox contents
puts the success message in a p tag
addition of spinner image, customer id submission and removed console log on sync success
has 2 new properties which cant be set by wc_order. Customer ID and invoice type.  Addition of comments, spacing and new meta fields to keep track of response IDs
passes the customer id from post in ajax. new param on sync method for customer id, passes into woocommerce invoice object.  Call to new successful method on woocommerce invoice
gets the invoice number and custom ID. requires making the WC order, and then passing that into the woocommerce invoice class.

save method now passes customer id to sync in sync class
customer ID input, spinner holder, labels and reference to twinfield invoice number.
using static again
default for invoiceNumber and change products extra to orders extra
ajax method for handling the loading and responding of an order. used in the form builder ui
additional lines in shipping
removed comments
integration to woocommerce settings.
update to invoice form view
load the integration