Add support for Laravel Blade / AdonisJS Edge Templating Syntax

As per Slack conversation with @soywiz, given the flexibility of Korte's implementation, it'd be great to support [Laravel Blade](https://laravel.com/docs/5.8/blade)/ [AdonisJS Edge](https://edge.adonisjs.com/) kind of syntax. I personally think that Blade/Edge is more to the spirit of Kotlin than Jinja syntax as far as the conciseness of the templating language goes. Blade and Edge syntax are almost exact with few minor differences (like [self closing tags](https://edge.adonisjs.com/docs/syntax-guide#_self_closing_tags), which, again, shows the conciseness of the syntax).