Refactored (internal) fmt

[jorgecarleitao]

This PR makes writing to Debug and to io::print faster by lifting common logic to an API that allows stream writing to an implementor of std::fmt::Write.

It also makes this part of the code a bit more linear.

[codecov]

Codecov Report

Merging #842 (f165759) into main (2c4dbb2) will increase coverage by 0.35%.
The diff coverage is 67.76%.

@@            Coverage Diff             @@
##             main     #842      +/-   ##
==========================================
+ Coverage   71.55%   71.90%   +0.35%     
==========================================
  Files         326      336      +10     
  Lines       17643    18184     +541     
==========================================
+ Hits        12624    13076     +452     
- Misses       5019     5108      +89     

Impacted Files	Coverage Δ
src/array/binary/mod.rs	87.35% <ø> (+6.50%)	⬆️
src/array/boolean/mod.rs	70.42% <ø> (-0.82%)	⬇️
src/array/dictionary/mod.rs	77.96% <ø> (+7.19%)	⬆️
src/array/fixed_size_binary/mod.rs	68.42% <ø> (-1.20%)	⬇️
src/array/fixed_size_list/fmt.rs	0.00% <0.00%> (ø)
src/array/fixed_size_list/mod.rs	71.66% <ø> (+2.31%)	⬆️
src/array/list/mod.rs	81.48% <ø> (+0.08%)	⬆️
src/array/mod.rs	62.76% <ø> (-8.29%)	⬇️
src/array/primitive/mod.rs	80.23% <ø> (ø)
src/array/struct_/mod.rs	64.06% <ø> (+4.64%)	⬆️
... and 29 more

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