Agents got killed before collision while shifting

[tommy33790]

📜 Description

Changes proposed in this pull request:

• Closes Shifting agents get killed before wall collision #65
• Agents no longer die when running into a wall while shifting
  • Agents used to check once and move thrice, then hit a wall and die
• Now they just stop for this turn before they encounter a wall

🔨 Breaking Changes

• None

✅ Checklist:

• Created tests which fail without the change (if possible)
• Extended the documentation (if necessary)

📸 Screenshots

• None