CodeIgniter 4 Playground

@includebeer

I followed the additional playground/README.md instructions.

Composer downloaded lots of files, I set the .env->Database with relevant login details and still failed

@MGatner
The GitHub README.md file was not copied and pasted accurately.

Some of the instructions are not crystal clear

cd playground composer install

CI_ENVIRONMENT = development app.baseURL = 'http://localhost:8080/'

php spark migrate php spark dbeed PlaygroundSeeder