refactor: cleaning up reader

[codecov[bot]]

Codecov Report

Merging #141 (31ebdaa) into main (0d1242b) will increase coverage by 0.92%. The diff coverage is 98.38%.

:exclamation: Current head 31ebdaa differs from pull request most recent head 77d67da. Consider uploading reports for the commit 77d67da to get more accurate results

@@            Coverage Diff             @@
##             main     #141      +/-   ##
==========================================
+ Coverage   91.43%   92.35%   +0.92%     
==========================================
  Files          14       14              
  Lines        1949     1897      -52     
==========================================
- Hits         1782     1752      -30     
+ Misses        167      145      -22     

Impacted Files	Coverage Δ
src/nd2/_pysdk/_sdk_types.py	100.00% <ø> (ø)
src/nd2/_pysdk/_pysdk.py	89.71% <96.87%> (-1.34%)	:arrow_down:
src/nd2/_binary.py	85.56% <100.00%> (+0.15%)	:arrow_up:
src/nd2/_clx_xml.py	93.18% <100.00%> (+0.87%)	:arrow_up:
src/nd2/_legacy/_legacy.py	89.90% <100.00%> (ø)
src/nd2/_pysdk/_parse.py	94.24% <100.00%> (ø)
src/nd2/nd2file.py	95.13% <100.00%> (+6.07%)	:arrow_up:
src/nd2/structures.py	96.06% <100.00%> (+2.78%)	:arrow_up:

... and 1 file with indirect coverage changes

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