New features:
* --pdb excepts a PDB code input in addition to a file path (auto fetch from the PDB)
* Update to 2D figures using RNAviagte v1.0.0
* Calculates ligand: npr1, npr2, geometry, and QED score
* --chain default value changed to automatically detect the first RNA chain in the structure
* Integrated essential RNAvigate features to streamline installation
Bug fixes
* Improved error messaging
* Fixed ligand bugs
* 1 fixed offset bug