[BUGS]: Some quick i/o bugfixes

[abukowski21]

Make sure dt is specified for each output type, and change default inputs

Some super minor bug fixes. And a little new feature:

• If there were more output types than dt's, there would be an out-of-range json error and no more info. this catches those errors.
• Cent_acc was not included in the default input file
  • Centripetal and Cent_acc are both checked? IDK if this is right.
  • See here. Centripetal is not used, only calc_cent_acc - in main
• If Ions output type is specified, output the magnetic coordinates
  • MLT is not right, but the magnetic coordinates are output

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)

How Has This Been Tested?

Tested with correct, and incorrect input files. Errors were caught correctly.

Test configuration

-WSL Ubuntu gcc/g++ 13

Checklist:

• [N/A] Make sure you are merging into the develop (not master) branch
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• [N/A] I have made corresponding changes to the documentation
• My changes generate no new warnings
• [N/A] I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• [N/A] Add a note to CHANGELOG.md, summarizing the changes

[abukowski21]

SUPER minor changes here. Wanted to get them into the most recently active branch rather than develop to prevent merge conflicts later.