Fix mi-go guardians moving away from its tower

[Marcos6226]

Summary

Bugfixes "Fix mi-go guardians moving too far away from its tower."

Purpose of change

This PR should fix #59545

Steps to reproduce the bug and see if it's fixed:

1. Find or spawn a mi-go tower.
2. Aggro a mi-go guardian to pursue you.
3. Check if it will not follow you to the end of the world.

Describe the solution

Based on the issue comments, I have decided to heed the suggestion of adding a "patrol": line. But the format present does not permit this so I modified it to be similar of the PR mentioned on the comments. Thanks LyleSY!

Describe alternatives you've considered

I'm not really sure if this is the best solution ever to this problem (my first time messing with mapgen) but, as always, I'm open to any suggestions.

Testing

I have spawned a mi-go scout tower and aggroed some guards to follow me. They will pursue me, but after some distance (or after I break the line-of-sight), they will stop following me and return to their base, as expected.

Additional context

None

[Venera3]

This will have them return to that one spot the moment you break eye contact - I suggest setting up a patrol route around the base, that'll keep them from being too dumb. The patrol routes can deal with coords outside of the mapgen in question as well, so you can even set them to patrol the neighboring tiles.

[Marcos6226]

This will have them return to that one spot the moment you break eye contact - I suggest setting up a patrol route around the base, that'll keep them from being too dumb. The patrol routes can deal with coords outside of the mapgen in question as well, so you can even set them to patrol the neighboring tiles.

Done, thanks for the help.