Add hardware compatibility flags for CPU rendering and HIPRT control

- Introduced `--force-cpu-rendering` and `--disable-hiprt` flags to the runner command, allowing users to enforce CPU rendering and disable HIPRT acceleration.
- Updated the runner initialization and context structures to accommodate the new flags, enhancing flexibility in rendering configurations.
- Modified the rendering logic to respect these flags, improving compatibility and user control over rendering behavior in Blender.

README.md

@@ -154,6 +154,9 @@ bin/jiggablend runner --api-key <your-api-key>
 # With custom options
 bin/jiggablend runner --manager http://localhost:8080 --name my-runner --api-key <key> --log-file runner.log
 
+# Hardware compatibility flags (force CPU + disable HIPRT)
+bin/jiggablend runner --api-key <key> --force-cpu-rendering --disable-hiprt
+
 # Using environment variables
 JIGGABLEND_MANAGER=http://localhost:8080 JIGGABLEND_API_KEY=<key> bin/jiggablend runner
 ```