Update readme (#1570)

* Cleanup badges

* Remove comment

* Remove profiling section

* Move acknowledgment

* Move citations

* Fix badge display

* Move build your robot section

* Fix nightly badge

* Revert be13b3f

* Update README.md

Co-authored-by: HUANG TZU-CHUN <tzu.chun.huang.tw@gmail.com>
Signed-off-by: Simon Alibert <75076266+aliberts@users.noreply.github.com>

* chore(docs): optimize readme for PyPI rendering

* chore(docs): move policy readme to docs folder + symlink in policy dirs

* fix(docs): max width og lerobot logo + url in citation block

---------

Signed-off-by: Simon Alibert <75076266+aliberts@users.noreply.github.com>
Co-authored-by: HUANG TZU-CHUN <tzu.chun.huang.tw@gmail.com>
Co-authored-by: Steven Palma <steven.palma@huggingface.co>

docs/source/policy_smolvla_README.md

@@ -0,0 +1,14 @@
+## Paper
+
+https://arxiv.org/abs/2506.01844
+
+## Citation
+
+```bibtex
+@article{shukor2025smolvla,
+  title={SmolVLA: A Vision-Language-Action Model for Affordable and Efficient Robotics},
+  author={Shukor, Mustafa and Aubakirova, Dana and Capuano, Francesco and Kooijmans, Pepijn and Palma, Steven and Zouitine, Adil and Aractingi, Michel and Pascal, Caroline and Russi, Martino and Marafioti, Andres and Alibert, Simon and Cord, Matthieu and Wolf, Thomas and Cadene, Remi},
+  journal={arXiv preprint arXiv:2506.01844},
+  year={2025}
+}
+```