add all NeoDB features to NiceDB

[alphatownsman]

Check List

• [x] create PR
• [x] clean up code
• [x] review db change
• [x] document migration steps
• [x] test run
• [ ] migration
• [ ] remove unused field is_private

Migration Steps

• Install Redis
• Follow doc/GUIDE.md, start with the step of pip install
• Migrate visibility field:

update books_bookmark set visibility = 2 where is_private = true;
update movies_moviemark set visibility = 2 where is_private = true;
update games_gamemark set visibility = 2 where is_private = true;
update music_albummark set visibility = 2 where is_private = true;
update music_songmark set visibility = 2 where is_private = true;

• Import current entity data into change history:

  python manage.py populate_history --auto

• Add API key from TMDB and other configurations as needed

[doubaniux]

It is amazing that there is no conflict 👀

[alphatownsman]

updated migration steps in description. everything I can think of is added.

You may try with a test site first.