Update test suite

[OCopping]

I have noticed some issue with the test suite, such as some tests running against the example files causing them to be deleted. I am updating the tests to use tmp_path and just copy in the relevant files to avoid this, among other things.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 96.03%. Comparing base (99a0969) to head (9d86be5).
⚠️ Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
src/techui_builder/status.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #256      +/-   ##
==========================================
+ Coverage   95.83%   96.03%   +0.19%     
==========================================
  Files          13       13              
  Lines         985      984       -1     
==========================================
+ Hits          944      945       +1     
+ Misses         41       39       -2     

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