Added ability to auto-download sd concepts repo

Added the ability to download the zip file for the sd concepts library. Zip file will be extracted, and have the core concepts directory moved to the correct location.

webui.sh

@@ -16,6 +16,7 @@ LSDR_CONFIG="https://heibox.uni-heidelberg.de/f/31a76b13ea27482981b4/?dl=1"
 LSDR_MODEL="https://heibox.uni-heidelberg.de/f/578df07c8fc04ffbadf3/?dl=1"
 REALESRGAN_MODEL="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.1.0/RealESRGAN_x4plus.pth"
 REALESRGAN_ANIME_MODEL="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.2.4/RealESRGAN_x4plus_anime_6B.pth"
+SD_CONCEPT_REPO="https://github.com/sd-webui/sd-concepts-library/archive/refs/heads/main.zip"
 
 
 if [[ -f $ENV_MODIFED_FILE ]]; then 
@@ -119,6 +120,22 @@ post_processor_model_loading () {
         wget $LSDR_MODEL -P $DIRECTORY/src/latent-diffusion/experiments/pretrained_models
         mv $DIRECTORY/src/latent-diffusion/experiments/pretrained_models/index.html?dl=1 $DIRECTORY/src/latent-diffusion/experiments/pretrained_models/model.ckpt
     fi
+
+    # Check to see if SD Concepts has been added yet, if not it will download it and place it in the proper directory
+    if [ -d "$DIRECTORY/models/custom/sd-concepts-library" ]; then
+        printf "SD Concepts Library already exists. Continuing...\n\n"
+    else
+        printf "Downloading and Extracting SD Concepts Library model. Please wait...\n"
+        mkdir $DIRECTORY/models/custom
+        wget $SD_CONCEPT_REPO
+        if ! command -v unzip &> /dev/null
+        then
+            printf "Warning: unzip could not be found. \nPlease install 'unzip' from your package manager and rerun this program.\n"
+            exit 1
+        fi
+        unzip main.zip
+        mv sd-concepts-library-main/sd-concepts-library $DIRECTORY/models/custom
+    fi
 }
 
 # Show the user a prompt asking them which version of the WebUI they wish to use, Streamlit or Gradio