As a developer, I want to have CI for all packages in this repo

[ilyamore88]

Jobs on push:

• Playground:
  • Linter;
  • Build.
• Model, Dom-adapters:
  • Linter;
  • Build;
  • Unit-tests;
  • Mutation tests only for changed files.

Jobs on merge:

• Playground:
  • Linter;
  • Build.
• Model, Dom-adapters:
  • Linter;
  • Build;
  • Unit-tests;
  • All mutation tests.

Some jobs can be moved to separate files, like the setup job.