* Parse_zone audit + minor misc cleanup (#83154)
## About The Pull Request
Does a audit on all uses of parse_zone, replacing most instances of it
with a new living-level proc that refers to the bodypart in that zone if
it exists.
In other cases, removes parse_zone entirely because the bodypart is
already confirmed to exist, so we just use plaintext_zone.
Also cleans up some single letter vars.
## Why It's Good For The Game
In the doc of ```plaintext_zone```, its said it ```Should be used for
parsing non-instantiated bodyparts```. 99% of the code ignores the
possibility of a bodypart existing, and so uses parse_zone when
plaintext_zone could be accessed instead.
## Changelog
🆑
code: Most instances of parse_zone now refer to the limb's
plaintext_zone var
/🆑
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Co-authored-by: Ghom <42542238+Ghommie@ users.noreply.github.com>
* Parse_zone audit + minor misc cleanup
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Co-authored-by: nikothedude <59709059+nikothedude@users.noreply.github.com>
Co-authored-by: Ghom <42542238+Ghommie@ users.noreply.github.com>
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