[Compat] TensorKit v0.15.2

[lkdvos]

Small improvements and fixes for the TensorKit v0.15.2 update

[codecov]

Codecov Report

❌ Patch coverage is 15.38462% with 44 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.11%. Comparing base (5508f7c) to head (dfcf70f).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/vectorspaces/sumspace.jl	25.00%	15 Missing ⚠️
src/tensors/abstractblocktensor/show.jl	0.00%	13 Missing ⚠️
src/tensors/blocktensor.jl	0.00%	6 Missing ⚠️
src/tensors/sparseblocktensor.jl	0.00%	6 Missing ⚠️
src/tensors/abstractblocktensor/abstractarray.jl	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
- Coverage   55.57%   55.11%   -0.46%     
==========================================
  Files          17       17              
  Lines        1463     1475      +12     
==========================================
  Hits          813      813              
- Misses        650      662      +12     

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