Create a test that ensures all files in input folder run without errors

[brookeslawski]

This test would go through all the input files in the input/ folder to ensure that they run without errors. This test ensure merely that all the files in the input folder run, not that the results are correct.

I created this test in tests/test_input_files.py as part of PR #60 and #73, which can be found in the brookeslawski:feature/sync_add_temp_vel_profile_input branch, however, the errors required significant development to fix and some are now outdated with respect to the sync branch.