Flag to include radec columns in index creation.

[delucchi-cmu]

Change Description

Closes #355.

Adds a convenience boolean flag for adding radec columns to output of index table creation.

Code Quality

• [x] I have read the Contribution Guide and LINCC Frameworks Code of Conduct
• [x] My code follows the code style of this project
• [x] My code builds (or compiles) cleanly without any errors or warnings
• [x] My code contains relevant comments and necessary documentation

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.73%. Comparing base (941b39a) to head (50c53d5). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #378 +/- ## ======================================= Coverage 99.72% 99.73% ======================================= Files 26 26 Lines 1481 1496 +15 ======================================= + Hits 1477 1492 +15 Misses 4 4 ```

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