move: laravel 7.x-8.x guide

Author: vikdiesel

.laravel-7x-8x/README.md

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+## Laravel 7.x & 8.x
+
+To install, please follow these steps. **Note:** We assume you start with a fresh Laravel project.
+
+- `cd` to project directory
+- Laravel 7.x `composer require vikdiesel/admin-one-laravel-dashboard:1.3.x --dev`
+- Laravel 8.x `composer require vikdiesel/admin-one-laravel-dashboard:1.5.x --dev`
+- `composer require laravel/ui`
+- `php artisan ui:controllers`
+- `php artisan ui:auth`
+- `php artisan jb:admin-one-preset`
+- `npm install`
+- `npm run dev` or `npm run prod`
+- `php artisan migrate`
+- `php artisan db:seed`
+
+## Laravel 9.x
+
+Please follow [guide for Laravel 9.x Jetstream Inertia Vue](https://github.com/vikdiesel/admin-one-laravel-dashboard).