chore(main): package presentation html for GitVerse releases

chore(lab): remove illustrations not referenced by the documents

fix(project): keep notebooks and plots in the repository

docs(changelog): describe releases 1.0.0-3.0.0

feat(lab): prepare laboratory work 3 for submission

feat(lab): prepare laboratory work 2 for submission

feat(lab): prepare laboratory work 1 for submission

chore(main): set up reproducible build of reports and presentations

before pull

feat(main): make course structure