[Feature Request] Native Support for PDB Format Proteins as Receptor Input

[zhengh96]

[Feature Request]
To enhance user experience and facilitate Uni-Dock's handling of PDB format proteins, I would like Uni-Dock to natively support PDB format proteins as receptor input. Currently, users need to convert PDB format proteins to pdbqt format to use Uni-Dock, which requires additional steps.

[Possible Solution]
I would like Uni-Dock to internally handle PDB format protein files, providing an option for users to directly use PDB format proteins as receptor input. Uni-Dock can automatically add the necessary information, such as atom types, charges, and adjustable bonds in the background.