Integrate with ECA

First stab at an integration done.

Allows now to build stuff like this:

Hi,

Thanks for your interest in the module and for the MR.

I will ping on ECA slack channel, to ask for a review from people more accustomed to ECA code to ask if the implementation is correct. even if it looks great!

Then I will handle the code quality parts. As it has been a long time since the pipeline has been executed, PHPStan and Coder rules had evolved since then.

grimreaper → credited jurgenhaas → .

Thanks @jurgenhaas for the review!

@das-peter Can you update the MR regarding the review points please?

Then I will finish code quality stuff.

Regarding the experience I had with https://www.drupal.org/project/eca_entity_share →

And regarding the approach we do in https://www.drupal.org/project/ui_suite: →
- one module and sub-modules for Core integrations
- when integrating with another contrib modules we do a separated project.

I think it will be better to have an eca_file_extractor dedicated project so it can live at its on speed.