Add Hybrid Solver

[maxpaik16]

Added CPU and GPU implementations of hybrid linear solver. The CPU solver is only built if MPI is found, and the GPU solver is only built if CUDA is found.

Added cuDSS wrapper

Added test case to verify hybrid linear solvers are converging well for a system with ill-conditioning due to contact

[codecov]

Codecov Report

❌ Patch coverage is 13.33333% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.10%. Comparing base (1b01e6c) to head (3773540).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/polysolve/linear/hybrid_utils/DisjointSet.cpp	0.00%	18 Missing ⚠️
src/polysolve/linear/HypreSolver.cpp	36.36%	7 Missing ⚠️
src/polysolve/linear/HypreSolver.hpp	0.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (13.33%) is below the target coverage (75.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #112      +/-   ##
==========================================
- Coverage   80.47%   80.10%   -0.38%     
==========================================
  Files          49       52       +3     
  Lines        2110     2141      +31     
  Branches      281      286       +5     
==========================================
+ Hits         1698     1715      +17     
- Misses        412      426      +14     

Flag	Coverage Δ
polysolve	80.10% <13.33%> (-0.38%)	⬇️

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