Improve metadata tags for discovery

Hi! I'm Niels from the Hugging Face community science team.

This PR adds descriptive tags to the YAML metadata to help users find your model when searching for terms like "novel view synthesis" or "NVS". I've also ensured the main title matches the paper title for better consistency.

The model card is already excellent and very well-documented!

README.md

@@ -5,9 +5,15 @@ license: other
 license_name: compvis-research-license
 license_link: LICENSE.md
 pipeline_tag: image-to-image
+tags:
+- novel-view-synthesis
+- nvs
+- 3d
+- self-supervised
+- scaling-laws
 ---
 
-# RayDer (Scalable Self-Supervised Novel View Synthesis from Real-World Video)
+# RayDer: Scalable Self-Supervised Novel View Synthesis from Real-World Video
 
 [![Project Page](https://img.shields.io/badge/Project-Page-blue)](https://compvis.github.io/rayder/)
 [![Paper](https://img.shields.io/badge/arXiv-paper-b31b1b)](https://arxiv.org/abs/2605.31535)
@@ -79,4 +85,4 @@ If you find our model or code useful, please cite our paper:
     author={Ulrich Prestel and Stefan Andreas Baumann and Nick Stracke and Björn Ommer},
     year={2026},
 }
-```
+```