Neubrex dts dss support

[d-chambers]

Description

This PR partially address #408 by adding IO support for Neubrex DTS/DSS forge files.

It also adds strain to the unit registry.

Checklist

I have (if applicable):

• referenced the GitHub issue this PR closes.
• documented the new feature with docstrings or appropriate doc page.
• included a test. See testing guidelines.
• your name has been added to the contributors page (docs/contributors.md).
• added the "ready_for_review" tag once the PR is ready to be reviewed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.84%. Comparing base (fa08013) to head (f57548d).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #411   +/-   ##
=======================================
  Coverage   99.84%   99.84%           
=======================================
  Files         109      112    +3     
  Lines        8843     8929   +86     
=======================================
+ Hits         8829     8915   +86     
  Misses         14       14           

Flag	Coverage Δ
unittests	99.84% <100.00%> (+<0.01%)	⬆️

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