Support for delta

[mtfishman]

Makes use of ITensor/BlockSparseArrays.jl#163.

[codecov]

Codecov Report

❌ Patch coverage is 82.82828% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.63%. Comparing base (2c2d41e) to head (234cd0b).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/fillarrays/kroneckerarray.jl	78.84%	11 Missing ⚠️
src/kroneckerarray.jl	84.00%	4 Missing ⚠️
...ensorAlgebraExt/KroneckerArraysTensorAlgebraExt.jl	86.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #33      +/-   ##
==========================================
+ Coverage   77.48%   79.63%   +2.15%     
==========================================
  Files          12       13       +1     
  Lines         786      874      +88     
==========================================
+ Hits          609      696      +87     
- Misses        177      178       +1     

Flag	Coverage Δ
docs	0.00% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.