[TODO] Finish moving from artifacts to relics

[olanti-p]

Is your feature request related to a problem? Please describe.

Relics have been partially ported (and partially re-implemented), but not fully: https://github.com/cataclysmbnteam/Cataclysm-BN/pull/161 https://github.com/cataclysmbnteam/Cataclysm-BN/pull/180 https://github.com/cataclysmbnteam/Cataclysm-BN/pull/386 https://github.com/cataclysmbnteam/Cataclysm-BN/pull/400

Describe the solution you'd like

1. Finish porting (and/or re-implementing) enchantments, see TODO list
2. (Optional, but strongly desired) Add tests for enchantments from step 1
3. Port relic activation and recharge code
4. Port relic procgen code
5. (Optional) Figure out how to keep procgenned names or descriptions
6. Per @chaosvolt's request, ensure there's an alternative to ARTC_PORTAL
7. Get rid of artifact code

Describe alternatives you've considered

Some BN-specific implementation(s) of features would also be fine, as long as artifacts are gone, and the new code is fully-featured.

Additional context

Relevant for game version 39352544f4f5ada4a4a9388cbbf4ffd3f7047dfc