ci: setup GHA workflow

[sathvikbhagavan]

No description provided.

[sathvikbhagavan]

A couple of monitor tests are failing. I am not sure whats happening there. @shuheng-liu any ideas?

[codecov-commenter]

Codecov Report

Attention: 54 lines in your changes are missing coverage. Please review.

Comparison is base (ec1ddea) 84.84% compared to head (abece29) 84.46%.
Report is 53 commits behind head on master.

Files	Patch %	Lines
neurodiffeq/solvers_utils.py	9.37%	29 Missing ⚠️
neurodiffeq/solvers.py	52.38%	20 Missing ⚠️
neurodiffeq/utils.py	66.66%	4 Missing ⚠️
neurodiffeq/conditions.py	97.29%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #210      +/-   ##
==========================================
- Coverage   84.84%   84.46%   -0.38%     
==========================================
  Files          22       21       -1     
  Lines        3609     3695      +86     
==========================================
+ Hits         3062     3121      +59     
- Misses        547      574      +27     

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