Ignore empty rows works before the header

[Drvi]

and other cleanups and tests

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +8.50 🎉

Comparison is base (a734a34) 81.95% compared to head (417de1c) 90.45%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #6      +/-   ##
==========================================
+ Coverage   81.95%   90.45%   +8.50%     
==========================================
  Files          10       10              
  Lines         410      419       +9     
==========================================
+ Hits          336      379      +43     
+ Misses         74       40      -34     

Impacted Files	Coverage Δ
src/ChunkedBase.jl	93.33% <ø> (ø)
src/ConsumeContexts.jl	91.66% <ø> (ø)
src/parser_serial.jl	100.00% <ø> (ø)
src/parser_parallel.jl	100.00% <100.00%> (ø)
src/payload.jl	100.00% <100.00%> (ø)
src/read_and_lex.jl	96.10% <100.00%> (+2.77%)	⬆️
src/read_and_lex_utils.jl	94.23% <100.00%> (+33.40%)	⬆️

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