Enhance add VR README for the VR directory, detailing setup, usage, and publishing instructions

Author: skim0119

.gitignore

@@ -1,12 +1,31 @@
 # rendered files
 *.png
 *.mov
+*.pkl
+*.npz
+*.mp4
+*.json
+*.jsonl
+*.npy
+
+# deprecated files
+_old*  
+
+# VR directory
+VR/node_modules/
+!VR/package.json
+!VR/package-lock.json
 
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
 *$py.class
 
+research
+model
+logs
+evaluations
+
 # C extensions
 *.so
 *.swp

VR/README.md

@@ -0,0 +1,23 @@
+# VR Prototype Interface
+
+This folder contains the Quest WebXR client and startup scripts for the multi-user soft-arm VR prototype powered by the `virtual_field` package.
+Deployment model:
+- Linux desktop starts and hosts the VR services.
+- Clients join over URLs:
+  - Headgear client opens HTTPS URL in Quest Browser.
+  - Object-publisher client connects to WSS URL from Python CLI.
+
+## Quick start
+
+Use `npx` or `bunx`, depending on your preference.
+
+### Serve the WebXR client over HTTPS
+
+Serve the WebXR client over HTTPS:
+
+```bash
+# In VR directory
+npx serve client -l 8443 --ssl-cert certs/dev-cert.pem --ssl-key certs/dev-key.pem
+# or
+bunx serve client -l 8443 --ssl-cert certs/dev-cert.pem --ssl-key certs/dev-key.pem
+```