chore: prepare package for BioC release (first round of changes)

[gladkia]

Summary

prepare the package for BioC release (first round of changes)

Details

• add biocViews terms
• make the Description field in the DESCRIPTION file more informative
• use AuthorsR instead of Author/Maintainer
• remove large unused files
• add examples for selected functions

[gladkia]

@paul-shannon - regarding remove large unused files - I've searched for large files and removed the ones not used within the repository.