refactor ChangesetAuthor.tsx
get interfaces right / fix unit test / cleanup
fix table layout
use Set constructor injection to bind the implementation for the new changesetTrailers API
cleanup / update CHANGELOG.md
cleanup
fix formatting
* prepare license-maven-plugin for license migration
* added license mapping for tsx files and added some more excludes
* Changeover to MIT license
* Fix build problems
* Delete old remaining licenses
* Add more exclude path for license checker
* Rename included netbeans license, add exclude .m2/repository/
* Specify .m2 exclude because not only repository/, also wrapper/ must match
* Add .cache/ exclude for license check
* Modify formatting of license in java classes to comply with convention and IDE
* Add IntelliJ documentation for license configuration
* Update CHANGELOG.md
* Exclude tmp/workspace/ dir for license check
* Edit README.md
Co-authored-by: Sebastian Sdorra <sebastian.sdorra@cloudogu.com>
