fix: Increase radius of singulo movement target.

[warriorstar-orion]

What Does This PR Do

This PR increases the radius around the target turf that a singularity moves towards, considering it successful if it gets within 2 tiles of the target. I'm calling this a fix because the behavior as written doesn't work as intended.

Why It's Good For The Game

Hitting a single tile with a randomly walking object is a crapshoot, especially if it only has a 20% chance to move towards it on any given tick. When the singulo can't manage to pin down its exact destination turf, it will instead be endlessly drawn to it, consuming the nearby station area and eventually running out of new things to consume.

Testing

Created singularities before and after, and observed them for 10 minutes. Observed that before this change, singulos would never hit their target despite coming within striking distance of it, and instead stick in a holding pattern around the target. Observed that after this change, singulos could hit their targets and select new ones.

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Declaration

• I confirm that I either do not require pre-approval for this PR, or I have obtained such approval and have included a screenshot to demonstrate this below.

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Changelog

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fix: Loose singulos more reliably pick new destinations when traveling.
/:cl: