support GPU (CUDA.jl) acceleration for evolution and spectrum

[ytdHuang]

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[codecov]

Codecov Report

Attention: 29 lines in your changes are missing coverage. Please review.

Comparison is base (d2239f4) 94.43% compared to head (67ecb5e) 89.31%.

❗ Current head 67ecb5e differs from pull request most recent head a60f366. Consider uploading reports for the commit a60f366 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
- Coverage   94.43%   89.31%   -5.12%     
==========================================
  Files          19       20       +1     
  Lines        1437     1479      +42     
==========================================
- Hits         1357     1321      -36     
- Misses         80      158      +78     

Files	Coverage Δ
src/ADOs.jl	100.00% <100.00%> (ø)
src/HierarchicalEOM.jl	100.00% <ø> (ø)
src/Spectrum.jl	90.09% <100.00%> (-9.91%)	⬇️
src/SteadyState.jl	80.85% <100.00%> (-6.96%)	⬇️
src/evolution.jl	82.19% <100.00%> (-8.22%)	⬇️
src/heom_matrices/M_Boson.jl	80.59% <100.00%> (-17.92%)	⬇️
src/heom_matrices/M_Boson_Fermion.jl	86.17% <100.00%> (ø)
src/heom_matrices/M_Fermion.jl	80.59% <100.00%> (-11.95%)	⬇️
src/heom_matrices/heom_matrix_base.jl	87.50% <66.66%> (-1.48%)	⬇️
ext/HierarchicalEOM_CUDAExt.jl	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

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