Release 0.2.0

[knope-bot]

Important

Merging this pull request will create this release

Breaking Changes

Add sparse matrix support for constraint matrices

This release adds support for sparse matrix representation in constraint specifications, enabling efficient handling of large-scale optimization problems with mostly zero coefficients.

New Features:

• Sparse matrix format using COO (Coordinate) representation
• Backward compatible with existing dense matrix format
• Comprehensive validation for sparse matrix inputs
• Memory-efficient handling of large problems

Usage:
Use the new sparse format instead of dense for problems with many zero coefficients:

{
  "constraints": {
    "sparse": {
      "rows": [0, 0, 1, 1],
      "cols": [0, 2, 1, 3],
      "values": [1, 1, 1, 1],
      "shape": [2, 4]
    },
    "sense": [">=", ">="],
    "rhs": [2, 3]
  }
}

Recommended for problems with > 1000 variables/constraints or < 10% non-zero coefficients.