type hint improvements to address #461

[AndrewAnnex]

may need more work/formatting

[codecov[bot]]

Codecov Report

Merging #462 (fdfe815) into main (5b6a483) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #462   +/-   ##
=======================================
  Coverage   99.86%   99.86%           
=======================================
  Files          13       13           
  Lines       15633    15633           
=======================================
  Hits        15612    15612           
  Misses         21       21           

Impacted Files	Coverage Δ
src/spiceypy/spiceypy.py	99.68% <100.00%> (ø)

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