Aceeditor is great but it's lacking a good documentation and examples.
On top of that building autocompleter is a nightmare, codemirror is much
more developer friendly.

- fixed dsl completer by making him to not suggest dsl function on
methods

…input on website

… storage

- moved loading flow.phar from playground-editor_controller.js to our
new dynamic loading mechanism

…is loaded

…stem

this prevents displaying other files required by wasm and creates a
clean workspace

format action uses php-cs-fixer under the hood to format the code and
update editor

when user clicks on a file in files browser he will see a readonly
preview of that file below the editor

…pty diffs when nothing changed