Feat: [#3171] normalize zero vector

[Autsider666]

===:clipboard: PR Checklist :clipboard:===

• 📌 issue exists in github for these changes
• 🔬 existing tests still pass
• 🙈 code conforms to the style guide
• 📐 new tests written and passing / old tests updated with new scenario(s)
• 📄 changelog entry added (or not needed)

==================

Closes #3171

Changes:

• Vector.normalize() return zero-vector ((0,0)) instead of (0,1) when normalizing a vector with a magnitude of 0

[eonarheim]

@Autsider666 Thanks for the fix! Much appreciated