Improve Dependency Management - Remotes Packages in drat repository - Remove `rgpt3`

[jan-abel-inwt]

see: https://github.com/Pandora-IsoMemo/MapR/issues/18#issuecomment-1914145727

It turns out that the issue arises from using a remote package ('rgpt3') in a CRAN-like repository (our 'drat' repo)

This doesn't work, because pak relies on the metadata in the Packages file of the drat repository and this file don't contain the remotes information.

• [x] https://github.com/Pandora-IsoMemo/data-tools/issues/68
• Remove dependency of rgpt3 in the following packages:
  • [x] https://github.com/Pandora-IsoMemo/bmsc-app/
  • [x] https://github.com/Pandora-IsoMemo/bpred
  • [x] https://github.com/Pandora-IsoMemo/iso-app
  • [x] https://github.com/Pandora-IsoMemo/MapR
  • [x] https://github.com/Pandora-IsoMemo/osteo-bior
  • [x] https://github.com/Pandora-IsoMemo/plotr
  • [x] https://github.com/Pandora-IsoMemo/resources

[jan-abel-inwt]

Additionally I will add the automation of the documentation