Add private local OCR comparison package

config.example.env

@@ -0,0 +1,12 @@
+# Copy values into your own shell environment; this file is not read automatically.
+# Keep real hostnames, usernames and key paths out of Git.
+OCR_VISION_MODE=local
+OCR_VISION_DEVICE=cpu
+# OCR_MODEL_HOME=/absolute/path/to/private/model-cache
+# OCR_VISION_PYTHON=/absolute/path/to/vision-venv/bin/python
+# OCR_VISION_SSH_TARGET=user@own-gpu-host
+# OCR_VISION_SSH_IDENTITY=/absolute/path/to/ssh-key
+# OCR_VISION_REMOTE_DIR=/absolute/path/to/clone
+# OCR_VISION_REMOTE_PYTHON=./.venv-vision/bin/python
+# OCR_VISION_REMOTE_DEVICE=gpu:0
+# OCR_VISION_REMOTE_UNSHARE=1