Determine Business/Working Days From Received min_delivery_date & min_delivery_date

Files Required by Packagist `composer.json` and `composer-lock.json` to clone extension to Packagist.com

Change of Parent Class usage from `AbstractCarrier` to `AbstractCarrierOnline`
Access Store ManagerInterface
Remove Unnecessary configurations for the Extension

Refactoring (Removed redundant fields from system.xml

Rates At Checkout Endpoint Admin Settings,(Sandbox & Production),
Read Rates Endpoints From Extension Configs.

Get all items from order
Get Origin details from checkout session(admin configs)
Get destination details from checkout session
Send body of request with all required data.
Respond with rates

Get all items from order
Get Origin details from checkout session(admin configs)
Get destination details from checkout session
Send body of request with all required data.
Respond with rates

Handling fee option for admin,
Access Token Fill in form for admin

When the user clicks on the tracking reference/order , the tracking modal  opens and displays the latest tracking information about the order.

Allow user(customer) and admin to click on "Track Order" and pop a modal with order tracking information

Add plugin to dropdown carriers in admin to enable :Shipping an order should allow the user to select "uAfrica.com" and specify the tracking reference.