Added support to write to Avro

[jorgecarleitao]

This PR adds minimal support to write to Apache Avro.

Things not yet supported:

• many types
• compression

[codecov]

Codecov Report

Merging #690 (3828960) into main (4bbbe62) will decrease coverage by 0.12%.
The diff coverage is 59.20%.

@@            Coverage Diff             @@
##             main     #690      +/-   ##
==========================================
- Coverage   70.44%   70.31%   -0.13%     
==========================================
  Files         300      306       +6     
  Lines       16591    16785     +194     
==========================================
+ Hits        11688    11803     +115     
- Misses       4903     4982      +79     

Impacted Files	Coverage Δ
src/io/avro/mod.rs	0.00% <ø> (ø)
src/io/avro/read/block.rs	71.42% <ø> (ø)
src/io/avro/read_async/metadata.rs	95.00% <ø> (ø)
src/io/csv/write/mod.rs	69.23% <ø> (ø)
src/io/csv/write/serialize.rs	49.13% <ø> (ø)
src/io/iterator.rs	71.42% <ø> (ø)
src/io/avro/write/serialize.rs	48.54% <48.54%> (ø)
src/io/avro/read/schema.rs	52.63% <50.00%> (-1.06%)	⬇️
src/io/avro/write/schema.rs	54.54% <54.54%> (ø)
src/io/avro/write/header.rs	60.00% <60.00%> (ø)
... and 5 more

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