read_sweep fix

[syedhamidali]

• Closes Issue with read_sweep #16
• Tests added
• Changes are documented in history.md

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (41601f0) to head (5afa352).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
radarx/io/imd.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main     #17   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files          3       3           
  Lines        191     192    +1     
=====================================
- Misses       191     192    +1     

Flag	Coverage Δ
notebooktests	0.00% <0.00%> (ø)
unittests	0.00% <0.00%> (ø)

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