Load more than one CIF

This is to add more than one phase for the refinement.

Need to support 1+ phase input as a CIF

TODOs:

• Adjustment to the tool

  • Make the CLI input for CIF take a list here
  • Have run_gsas2_fit take in a list for CIF:
    • input here
    • docstring here
  • Create a "for-loop" to add the phases to the refinement here
  • Create a "for-loop" to output the refined phases here
  • Release image container v0.

• Adjustment to the NDIP XML

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