Enhance rounding methods

[akisschinas]

Enhance Rounding Methods

This PR improves the rounding functionality by introducing multiple barrier-based methods in dingo:

• Log-barrier – classical approach leveraging analytic center computations.
• Vaidya barrier – improves efficiency via Vaidya’s cutting-plane framework.
• Volumetric barrier – achieves robust performance by incorporating volumetric center techniques.

These additions provide more flexibility and allow experimenting on rounding method with different barrier strategies.

The implementations of all those methods are provided by volesti package.