Rename Margin Cache Hive Columns

[smcguire-cmu]

Change Description

In the current margin cache generation, the values of the hive columns NOrder, NPix, and Dir are those from the margin's original pixel, and so do not match the hive values in the hipscat directory structure. This renames them to add the prefix margin_, ..., and adds the hive columns that match the path to their pixel in the hipscat structure.
closes #188

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0ba5bcb) 99.45% compared to head (6945e96) 99.45%.

❗ Current head 6945e96 differs from pull request most recent head ad0e318. Consider uploading reports for the commit ad0e318 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #199   +/-   ##
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  Coverage   99.45%   99.45%           
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  Files          29       29           
  Lines        1455     1461    +6     
=======================================
+ Hits         1447     1453    +6     
  Misses          8        8           

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