modified inference script and custom preprocessing script

[BBC-Esq]

Added two files:

1. A modified preprocessing script that removes the complex tensorflow dependencies and instead relies on torch and torchvision, which are already dependencies anyways...so why use tensorflow at all?

2. An inference script that works assuming you use the modified image_preprocessing_molmo.py script provided above. NOTE: this script differs from the original inference script also in that it takes a hardcoded path to the molmo repository files instead of relying on the repo id and automatically downloading them. Feel free to modify for your use-case, however.