Better error when noise is passed to TDVP

[mtfishman]

Fixes #130, supersedes #146.

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 90.23%. Comparing base (ea26fcd) to head (4064a62).

Files with missing lines	Patch %	Lines
src/solvers/sweep_update.jl	0.00%	1 Missing ⚠️
src/solvers/tdvp.jl	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #147      +/-   ##
==========================================
- Coverage   90.28%   90.23%   -0.06%     
==========================================
  Files          54       54              
  Lines        3583     3585       +2     
==========================================
  Hits         3235     3235              
- Misses        348      350       +2     

Flag	Coverage Δ
docs	18.43% <0.00%> (-0.02%)	⬇️

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