Fix animals stuck in panic state #514

[ModMaker101]

Description

Fixes an issue where animals would remain in the panic state forever after being hit. The panic behavior now expires after 3-5 seconds.

Changes

Previous Behavior

After an animal with the panic goal was hit once, it would enter the state and continue running forever until killed.

Root Cause

The goal didn't have a timeout mechanism that would expire after getting hit like in the base game(s).

New Behavior

Animals now only remain in the panic state for a randomized about of 60-100 ticks, after which they return back to regular behavior.

Fix Implementation

• Added logic to check the timestamp of the last damage evnet.
• Introduced a random panic duration.
• The panic goal will now stop activating if the time since the last damage goes past the duration.
• Updated null pointer checks to use nullptr.

Related Issues

• Fixes Animals stuck in panic state permenently after being hit. #514

[ModMaker101]

Ready to merge.