Define BasisStateProjector.compute_sparse_matrix

[AnuravModak]

Towards #5721.

[AnuravModak]

Hi, Let me know if i need to do any further changes on this, here i could see some conflicting files but the resolve conflicts option is disabled!! Let me know what else could be done from my side.

[albi3ro]

Sorry about the delay. Notifications sometimes just get a bit buried.

I cleaned up some formating changes in other parts of the code. We try to make global stylistic changes in dedicated stylistic PR's, and keep code changes localized to the relevant parts of the code. Otherwise, it can be easy to miss an actual code change buried in stylistic changes, difficult to quickly estimate the scope and impact of a PR, and keep an accurate git history.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.65%. Comparing base (a456fce) to head (0d31bc1).
Report is 295 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5790      +/-   ##
==========================================
- Coverage   99.65%   99.65%   -0.01%     
==========================================
  Files         428      428              
  Lines       41160    40872     -288     
==========================================
- Hits        41020    40731     -289     
- Misses        140      141       +1     

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[PietropaoloFrisoni]

Thank you @AnuravModak!

Just a couple of comments from my end : )