Simplified example

[jorgecarleitao]

Made s3 example use range-reader, since it is now available at https://crates.io for general use.

[codecov]

Codecov Report

Merging #619 (59c2f71) into main (b3ed162) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #619   +/-   ##
=======================================
  Coverage   69.70%   69.71%           
=======================================
  Files         299      299           
  Lines       16599    16599           
=======================================
+ Hits        11571    11572    +1     
+ Misses       5028     5027    -1     

Impacted Files	Coverage Δ
src/io/parquet/read/nested_utils.rs	78.43% <0.00%> (+0.98%)	⬆️

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