Coorection to GetLowerSpan method in nurbs_utilitites

[NickNick9]

📝 Description

This PR improves the GetLowerSpan function in NurbsUtilities by adding a correction mechanism for ParameterT to ensure numerical robustness. The enhancement helps handle cases where ParameterT is very close to a knot, avoiding potential floating-point precision issues.

[rubenzorrilla]

Makes sense for me. Not sure at all, but maybe you want to throw a warning message if this happens.

[rickyaristio]

Nice catch! Could you provide one in the test when we need the floating point tolerance?

[NickNick9]

@rubenzorrilla
We prefer not to throw a warning every time this happens because in large simulations it may occur frequently.

@rickyaristio
Nice suggestion! We created a test as you said. Now is ready to be merged.

[rubenzorrilla]

@rubenzorrilla We prefer not to throw a warning every time this happens because in large simulations it may occur frequently.

Fair enough.

[NickNick9]

@rickyaristio, could you approve the merge? Thanks!