YT-CPPHGL-8: Implement the undirected incidence-matrix model

[SpectraL519]

Created the impl::undirected_incidence_matrix model class, which stores a VxE incidence matrix and defines the following operations:

• Adding and removing vertices
• Adding and removing hyperedges
• Binding and unbinding vertices to hyperedges
• Retrieving the degree of a vertex
• Retrieving the set of hyperedges incident with (containing) a given vertex
• Retrieving the number of vertices incident with a given hyperedge
• Retrieving the set of vertices incident with a given hyperedge

[Copilot]

Pull request overview

This PR implements the undirected_incidence_matrix model class for the HGL (HyperGraph Library) component of the CPP-GL project. The implementation provides a VxE (vertices by hyperedges) incidence matrix representation for undirected hypergraphs.

Key changes:

• Added undirected_incidence_matrix class with vertex and hyperedge manipulation operations
• Implemented binding operations to manage vertex-hyperedge relationships via a 2D boolean matrix
• Created comprehensive test suite with 15 test cases covering all operations

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
include/hgl/impl/incidence_matrix.hpp	New implementation of the undirected incidence matrix model with operations for managing vertices, hyperedges, and their bindings using a 2D boolean matrix
tests/source/hgl/test_incidence_matrix.cpp	Comprehensive test suite with 15 test cases covering initialization, vertex/hyperedge operations, binding operations, and edge cases with ID shifting

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[SpectraL519]

ok