add dinosaurs, dragons, and werebeasts

add some more campaign info
add encounter generators (alpha)

src/assets/fragments/bestiary/bats/bite-and-drain.md

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+Bite victim must **Save vs Paralyze** or fall unconscious for 1d10 rounds.
+
+### Drain Blood
+
+-   May drain blood from an unconscious victim, inflicting 1d4 hp damage each round automatically.
+-   Victim killed this way must **Save vs Spells** or become undead after 24 hours.