feat: Add CVXOPT solver infrastructure and VSCode settings

- Add CVXOPT dependency to pyproject.toml and uv.lock
- Create solver module with GLPK-based integer linear programming solver
- Add VSCode Python analysis settings
- Implement matrix and sparse matrix wrappers for CVXOPT
- Add GLPK solver wrapper with type-safe interfaces

.vscode/settings.json

@@ -0,0 +1,4 @@
+{
+    "python.analysis.typeCheckingMode": "basic",
+    "python.analysis.autoImportCompletions": true
+}