Migrate fixtures to new capability syntax

[FloEdelmann]

In PR #425 (new-capabilities branch), we have updated our schema to better represent the real world effect of capabilities (see also #267).

We have already migrated some fixtures, but not all. If you want to help, follow these steps:

1. Fork this repository, clone your fork to a local directory.
2. Switch to new-capabilities branch: git checkout new-capabilities
3. Update dereferenced schemas: make -B
4. Run ./tests/fixtures-valid.js.
5. Choose a fixture you want to migrate, and run ./cli/fixture-migration-helper.js -f fixtures/<manufacturer key>/<fixture key>.json in the project root folder. The script does a lot of the work for you!
6. Migrate the fixture definition (if you use an editor like VS Code, it'll provide you with inline suggestions and error checks). You might want to have the new capability types documentation open.
7. Change $schema back to its original value.
8. Run ./tests/fixtures-valid.js again. It should now pass for your fixture.
9. When you're done, commit and push your changes.
10. Open a new pull request against the new-capabilities branch: https://github.com/OpenLightingProject/open-fixture-library/compare/new-capabilities...YOUR_GITHUB_USERNAME:new-capabilities

[FloEdelmann]

Closing this since all fixtures are migrated and new ones need individual work anyway.