fix: Fix NPC laser finger infinite loop

[Coolthulhu]

Checklist

Required

• I wrote the PR title in conventional commit format.
• I ran the code formatter.
• I linked any relevant issues using github keyword syntax so it can be closed automatically.
• I have committed my changes to new branch that isn't main so it won't cause conflict when updating main branch later.

Optional

Purpose of change

Fix #5788

Describe the solution

In npc::aim, the NPC would use currently equipped weapon without doing a check for existing fake weapon. Added the check for fake weapon and allowed the NPC to aim that first.
Also added a check for infinite aiming loop. Doesn't fix anything, but will print a helpful debugmsg if infinite aiming loop ever happens again.

Describe alternatives you've considered

Testing

• Get the save from NPCs enter infinite loop when attempting to fire Finger Laser #5788
• Walk west
• NPC should laser a waif to death
• There should be no debugmsgs while that happens

Additional context

[chaosvolt]