Add GPU functionality

[computablee]

Which issue are you addressing?

This issue addresses a previous discussion on adding GPU support.

How have you addressed the issue?

Minimal GPU support is now supported via the ILGPU project. The approach that DotMP takes is not dissimilar to SYCL in its memory semantics, but tries to be faithful to the CPU API in how kernels are dispatched. More details will be added to the wiki.

How have you tested your patch?

There is an extremely minimal set of tests in the DotMP-Tests folder for GPU. This will need to be updated in the future.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (2db30d0) 99.19% compared to head (6fbab81) 99.09%.

Files	Patch %	Lines
DotMP/GPU/Buffer.cs	96.96%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #126      +/-   ##
==========================================
- Coverage   99.19%   99.09%   -0.10%     
==========================================
  Files          12       13       +1     
  Lines        1360     1431      +71     
  Branches      146      155       +9     
==========================================
+ Hits         1349     1418      +69     
  Misses          5        5              
- Partials        6        8       +2     

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