Trim use-can to buildable runtime sources and standalone Orin package

.gitignore

@@ -1,41 +1,20 @@
-# Python caches and local environments
+# Generated build/cache/runtime files
+/build*/
 __pycache__/
 *.py[cod]
-.venv/
-venv/
-
-# Build outputs (keep the supplied vendor libraries in lib/)
-build/
-/build-*/
 *.o
 *.a
-/vision-anti-pinch
-
-# Models and test media
-models/
-*.engine
-*.onnx
-*.pt
-*.mp4
-*.avi
-
-# Runtime outputs
-logs/
+.venv/
+venv/
 outputs/
-out/
-frames/
+logs/
 *.log
 *.pid
-
-# Local credentials and legacy SSH authentication helper
+*.mp4
+*.avi
+/models/
+*.onnx
+# Local credentials
 .env
 .env.*
 !.env.example
-ssh_expect.exp
-
-# The checked-in Orin deployment bundle intentionally includes its runtime assets.
-!/orin/build/
-!/orin/build/libvision_native.so
-!/orin/models/
-!/orin/models/engines/
-!/orin/models/engines/*.engine