Check and prepare D10 readiness

Hey @IT-Cru,

Please create a new release of this module for Drupal 10.

@navneet0693: I first need to investigate 🐛 Test if destruct() in ImageStyleWarmer class is working correct Fixed if I could fix it. Otherwise I have to revert changes from ✨ Improve responsiveness by processing initial styles in a service destructor Fixed which is already in 8.x-1.x and is currently blocker to create a new 8.x-1.2-rc2 (last one before final 8.x-1.2) release. I hope to have some time in the next days.

I've also created 2 roadmap issues for 8.x-1.2 and 8.x-1.3 releases which are linked on project page for som better overview.