[Tiles view] Add selection model

[tbsbdr]

Description

User Stories

• As a user I want to select multiple files in the tiles view so that I can sort out good and bad vacation photos.

Value

• File Explorer Basics

Acceptance Criteria

• Hover effect: If the mouse enters the preview, apply hover effect on preview-area (see design)
• click on checkbox alters selection model
• active selection is visualized via a padding around and resizing of the preview (see screenshot)
• clicklable area on the checkbox is a little bit bigger that the checkbox itself to improve usability
• note: selection model makes batch actions available like in list-view

Definition of done

• Functional requirements
  [ ] functionality described in the user story works
  [ ] acceptance criteria are fulfilled
• Quality
  [ ] codre review happened
  [ ] CI is green
  [ ] critical code received unit tests by the developer
  [ ] automated tests passed (if automated tests are not available, this test needs to be created and passed
• Non-functional requirements
  [ ] no sonar cloud issues