Import missing tamable beasts and their skills (#2161)

Add 26 beast spectre/companion varieties:
- Anundr, the Sandworm
- The Ravenous Fang (map variant)
- Rasp Scavenger (medium, large and Sekhema Trial sizes)
- Black Strider (incl. Sekhema Trial variant)
- Porcupine Crab
- Venomous Crab Matriarch
- Tarnished Beetle
- Adorned Scarab
- Adorned Beetle
- Hyena Demon
- Sun Clan Scavenger
- Tombshrieker (Sekhema Trial variant)
- Plague Nymph
- Nymph Wasp
- Chaw Mongrel
- Moray Clan
- Armoured Parasite
- Kreth Parasite
- Feral Primate
- Flesh Larva (ranged variant)
- Tendril Prowler
- Rabid Dog

Add the monster skills these beasts use to the spectre skill export;
this also fills in the previously-empty kits shared by The Devourer,
The Ravenous Fang and Rasp Scavenger.

The spectre list report now counts same-name monsters with different
Spirit reservations as distinct variants instead of duplicates, and
beast-category monsters are no longer excluded by the boss-health-bar
filter, since boss beast companions like Anundr carry it.

Author: ltogniolli