[FEAT] Map Getter

[colin-ho]

Closes #2240

[codecov]

Codecov Report

Attention: Patch coverage is 65.85366% with 42 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (main@7ef1c4b). Click here to learn what that means.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2255   +/-   ##
=======================================
  Coverage        ?   79.21%           
=======================================
  Files           ?      463           
  Lines           ?    53243           
  Branches        ?        0           
=======================================
  Hits            ?    42175           
  Misses          ?    11068           
  Partials        ?        0           

Files	Coverage Δ
daft/expressions/expressions.py	93.21% <100.00%> (ø)
src/daft-core/src/series/ops/downcast.rs	84.44% <100.00%> (ø)
src/daft-core/src/series/ops/mod.rs	100.00% <ø> (ø)
src/daft-dsl/src/functions/mod.rs	100.00% <100.00%> (ø)
src/daft-dsl/src/python.rs	93.24% <100.00%> (ø)
src/daft-dsl/src/functions/map/mod.rs	92.85% <92.85%> (ø)
daft/series.py	92.21% <66.66%> (ø)
src/daft-core/src/python/series.rs	94.75% <0.00%> (ø)
src/daft-core/src/series/ops/map.rs	50.00% <50.00%> (ø)
src/daft-core/src/array/ops/map.rs	72.72% <72.72%> (ø)
... and 1 more

[samster25]

👀