Add runtime requirements

Tested with the following:

    python -m venv venv
    source venv/bin/activate
    pip install -U pip
    pip install -r requirements.txt

on Ubuntu 22 with Python 3.8, or similar

requirements.txt

@@ -13,4 +13,7 @@ transformers==4.19.2
 webdataset==0.2.5
 open-clip-torch==2.7.0
 gradio==3.11
+kornia==0.6
+invisible-watermark>=0.1.5
+streamlit-drawable-canvas==0.8.0
 -e .