This PR slighlty improves the usability of the IWYU features of clang-tidy for the DD package. To this end, it marks the dd/Package_fwd.hpp include in the dd/Package.hpp header as an export. This way, header need not include both headers, but can only import the dd/Package.hpp header to also get the content of the foward declaration header.
Checklist:
[x] The pull request only contains commits that are related to it.
[x] I have added appropriate tests and documentation.
[x] I have made sure that all CI jobs on GitHub pass.
[x] The pull request introduces no new warnings and follows the project's style guidelines.
Description
This PR slighlty improves the usability of the IWYU features of clang-tidy for the DD package. To this end, it marks the
dd/Package_fwd.hppinclude in thedd/Package.hppheader as an export. This way, header need not include both headers, but can only import thedd/Package.hppheader to also get the content of the foward declaration header.Checklist: