added load save implementation for text files

[tclose]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.

Project coverage is 92.22%. Comparing base (06eb686) to head (2b8b53e).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
fileformats/core/fileset.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #91      +/-   ##
==========================================
- Coverage   92.26%   92.22%   -0.04%     
==========================================
  Files          47       47              
  Lines        5326     5328       +2     
  Branches      612      612              
==========================================
  Hits         4914     4914              
- Misses        301      303       +2     
  Partials      111      111              

Flag	Coverage Δ
	92.15% <77.77%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.