Simplified Primitive and Boolean scalar

[jorgecarleitao]

Made .value() return Option<T> instead of T and simplified their internals.

[codecov]

Codecov Report

Merging #648 (e1dbf6f) into main (f2c7503) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #648      +/-   ##
==========================================
+ Coverage   69.90%   69.97%   +0.07%     
==========================================
  Files         299      299              
  Lines       16628    16732     +104     
==========================================
+ Hits        11624    11709      +85     
- Misses       5004     5023      +19     

Impacted Files	Coverage Δ
src/compute/comparison/mod.rs	23.07% <ø> (ø)
src/scalar/boolean.rs	81.81% <100.00%> (-4.85%)	⬇️
src/scalar/primitive.rs	72.22% <100.00%> (-9.26%)	⬇️
src/array/utf8/mutable.rs	85.77% <0.00%> (+0.39%)	⬆️
src/array/binary/mutable.rs	80.16% <0.00%> (+0.80%)	⬆️
src/io/parquet/read/nested_utils.rs	78.43% <0.00%> (+0.98%)	⬆️
src/compute/cast/primitive_to.rs	77.41% <0.00%> (+1.49%)	⬆️
src/compute/arithmetics/time.rs	44.23% <0.00%> (+1.92%)	⬆️

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[yjhmelody]

LGTM