Add support for truncation, matrix functions

[mtfishman]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 91.52542% with 5 lines in your changes missing coverage. Please review.

Project coverage is 63.22%. Comparing base (6af509f) to head (165796c).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/KroneckerArrays.jl	91.52%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #9      +/-   ##
==========================================
+ Coverage   58.88%   63.22%   +4.33%     
==========================================
  Files           1        1              
  Lines         360      416      +56     
==========================================
+ Hits          212      263      +51     
- Misses        148      153       +5     

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

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