chore: optimize tests and docs

[hirasso]

Description

Some things from the recently closed PR #84 that make sense for future development

• add a test for moving <dialog> fragments to the top layer
• create files in ./tests/fixtures/dist both before playwright tests as well as before test:e2e:serve
• update npm dependencies
• Use <dialog open> elements in all modal overlay examples

Direct link to the new README: https://github.com/swup/fragment-plugin/blob/chore/cleanup-tests-and-docs/README.md

Checks

• The PR is submitted to the main branch
• The code was linted before pushing (npm run lint)
• All tests are passing (npm run test)
• New or updated tests are included
• The documentation was updated as required

[github-actions]

Playwright test results

 15 passed

Details

 15 tests across 1 suite
 
 0d73836

[hirasso]

@daun ready for review I guess :)

[daun]

👌