Added support for datatypes serde

[houqp]

feature gated with serde_datatypes, close #766.

[codecov]

Codecov Report

Merging #858 (35d949e) into main (b6a6780) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #858   +/-   ##
=======================================
  Coverage   71.48%   71.48%           
=======================================
  Files         335      335           
  Lines       17897    17897           
=======================================
+ Hits        12793    12794    +1     
+ Misses       5104     5103    -1     

Impacted Files	Coverage Δ
src/datatypes/field.rs	100.00% <ø> (ø)
src/datatypes/mod.rs	97.22% <ø> (ø)
src/datatypes/physical_type.rs	100.00% <ø> (ø)
src/datatypes/schema.rs	33.33% <ø> (ø)
src/bitmap/utils/slice_iterator.rs	87.93% <0.00%> (+1.72%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b6a6780...35d949e. Read the comment docs.

[jorgecarleitao]

Thanks @houqp , very clean.