feat: Add support for Krita AI Diffusion support

This commit adds support for integrating Krita AI Diffusion models and nodes into the Comfy image editing application. It includes the following changes:

- Downloads recommended models for Krita AI Diffusion if enabled
- Symlinks the downloaded upscale models into the models directory
- Adds environment variables to enable/disable dependancy node packs
- Clones and sets up the required Git repositories for those node packs if enabled
- Installs additional dependencies like aiohttp and tqdm if Krita AI Diffusion is used

These changes allow Comfy to leverage the powerful image generation and editing capabilities provided by the Krita AI Diffusion project. Users can now access advanced features like outpainting, inpainting, upscaling, etc. within the Comfy UI.

The commit also improves the build process by using a cache for pip installs and specifying types for mounted volumes in Docker for better performance and reproducibility.

services/comfy/Dockerfile

@@ -47,8 +47,12 @@ RUN --mount=type=cache,uid=${USE_UID},gid=${USE_GID},target=${CACHE} \
   git reset --hard ${VERSION}' && \
   pip --cache-dir=${CACHE}/pip install -r requirements.txt && \
   if [ "${USE_KRITA}" = "true" ]; then \
-    USE_CNAUX="true"; USE_IPAPLUS="true"; \
-    USE_INPAINT="true"; USE_TOOLING="true"; \
+    pip --cache-dir=${CACHE}/pip install aiohttp tqdm && \
+    git clone https://github.com/Acly/krita-ai-diffusion.git && \
+    cd krita-ai-diffusion && git checkout main && \
+    git submodule update --init && cd ..; \
+    export USE_CNAUX="true" USE_IPAPLUS="true" \
+    USE_INPAINT="true" USE_TOOLING="true"; \
   fi; \
   if [ "${USE_GGUF}" = "true" ]; then \
     git clone https://github.com/city96/ComfyUI-GGUF.git && \
@@ -74,7 +78,7 @@ RUN --mount=type=cache,uid=${USE_UID},gid=${USE_GID},target=${CACHE} \
   if [ "${USE_INPAINT}" = "true" ]; then \
     git clone https://github.com/Acly/comfyui-inpaint-nodes.git && \
     cd comfyui-inpaint-nodes && git checkout main && \
-    pip install opencv-python && cd ..; \
+    pip --cache-dir=${CACHE}/pip install opencv-python && cd ..; \
   fi; \
   if [ "${USE_TOOLING}" = "true" ]; then \
     git clone https://github.com/Acly/comfyui-tooling-nodes.git && \