Fix README.md frontmatter formatting

- Quote sdk_version per HF template format
- Remove hf_oauth (not in standard template)
- Add foundationpose tag
- Fix 6D-pose to 6d-pose for consistency

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

README.md

@@ -4,15 +4,15 @@ emoji: 🎯
 colorFrom: blue
 colorTo: purple
 sdk: gradio
-sdk_version: 4.50.0
+sdk_version: "4.50.0"
 app_file: app.py
 pinned: false
-hf_oauth: false
 tags:
   - computer-vision
-  - 6D-pose
+  - 6d-pose
   - object-detection
   - robotics
+  - foundationpose
 ---
 
 # FoundationPose Inference Server