Add SepReaderOptions.Trim aka Trim Support

[nietras]

Fix #74

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 99.04762% with 1 line in your changes missing coverage. Please review.

Project coverage is 99.20%. Comparing base (dbbffdb) to head (e780f9d).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
src/Sep/Internals/SepUnescape.cs	96.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #172      +/-   ##
==========================================
+ Coverage   99.15%   99.20%   +0.04%     
==========================================
  Files          47       47              
  Lines        2362     3512    +1150     
  Branches      358      385      +27     
==========================================
+ Hits         2342     3484    +1142     
- Misses          7       25      +18     
+ Partials       13        3      -10     

Flag	Coverage Δ
Debug	98.60% <94.28%> (?)
Release	91.10% <98.61%> (-8.05%)	⬇️
macos-latest	91.42% <98.09%> (?)
ubuntu-latest	98.54% <94.28%> (?)
windows-latest	?

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.