Follow the upstream rename: the local-dev path-repo toggle and docs now reference bussnet/propresenter7-php-lib to match the renamed package, and note it is consumed as a composer vcs repository.
The propresenter parser package was renamed; it is consumed as bussnet/propresenter7-php-api (dev-master) from the forgejo VCS repo. Update the stale propresenter/parser references in the local-dev toggle and docs so the local path-repo toggle keeps working.
Replace path repository with VCS pointing to
git.stadtmission-butzbach.de/public/propresenter-php.git.
Add use_local_pp_lib.sh to toggle between remote and local checkout.
Fix test fixture paths after repo restructure (ref/ → doc/reference_samples/).
