feature: bestiary tracker

[reyaleman]

Pull Request Prelude

• [x] I have followed proper The Forgotten Server code styling.
• [x] I have read and understood the contribution guidelines before making this PR.
• [x] I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

added bestiary tracker feature

Issues addressed:

[MillhioreBT]

I suggest waiting for PR #4412 to merge and then do a rebase. I will leave my reviews later.