Improve writer ergonomics + support (zstd) compression

[Uinelj]

No description provided.

[codecov]

Codecov Report

Merging #24 (b4b3ebf) into main (133ea94) will increase coverage by 4.10%.
Report is 18 commits behind head on main.
The diff coverage is 80.61%.

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   32.54%   36.64%   +4.10%     
==========================================
  Files           9       11       +2     
  Lines         636      704      +68     
==========================================
+ Hits          207      258      +51     
- Misses        429      446      +17     

Files Changed	Coverage Δ
src/oscar_doc/reader.rs	79.20% <ø> (ø)
src/oscar_doc/types/document.rs	0.00% <0.00%> (ø)
src/oscar_doc/types/metadata.rs	0.00% <0.00%> (ø)
src/oscar_doc/writer.rs	100.00% <ø> (ø)
src/v3/types/document.rs	52.23% <0.00%> (-6.78%)	⬇️
src/v3/writer/docwriter.rs	87.50% <87.50%> (ø)
src/v3/writer/writer.rs	94.36% <94.20%> (+22.93%)	⬆️

... and 1 file with indirect coverage changes