EasyPark SaaS - Vehicle Parking Management System 1.8

* Added SMS Template
* Added Twilio Integration for Sending SMS
* Added Paystack Payment Gateway Integration
* Added Report Section: Parking Slot Availability & Income Report

* Added Email notification enable/disable option.
* Added Owner account email verification enable/disable option.
* Added Email notification template

Added Flutterwave payment gateway integration in subscription packages.

* Added theme multicolor with custom color picker
* Small improvement in theme design layout.

Small improvement in pricing, settings, and role page design layouts.