hello .editorconfig

[lkraav]

Editors could get the right idea from the start. Any reason why not?

---

This change is 

[CLAassistant]

All committers have signed the CLA.

[web-padawan]

Thanks for the PR! Personally I like the .editorconfig though haven't used it for a while.
Once the team is back from holidays, we will discuss whether we want to use it or not.

[lkraav]

I searched your GH org for prior art https://github.com/search?q=org%3Avaadin+.editorconfig&type=Code and even though only 4 matches and nearly all the same, other than some comments, ended up picking what looked like the cleanest https://github.com/vaadin/base-starter-angular/blob/7dbd434db2c2c36807533f018c45c62f3837cf7f/.editorconfig for the base.

As far as I can tell, all web components are already following this format (I admit, no detail analysis has been run), so making these conventions explicit shouldn't cause any discomfort.

[limonte]

why trailing whitespaces should be allowed in md files?

[lkraav]

As a matter fact, I have no idea, was curious about this myself. But I thought since I think all GH searches through your repos had this set, maybe you guys specifically somewhat agreed on this already.

OTOH, it could also be some kind of a boilerplate default that I'm not aware of?

Google pointed me to editorconfig/editorconfig-vscode#153

When I add 2 spaces to the end of a line to create a markdown line break and then save the file, the trailing spaces are removed.

So apparently trailing whitespace logic is part of MD.

[limonte]

Interesting, thanks @lkraav!