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_diffusion_README.md

@@ -0,0 +1,14 @@
+## Paper
+
+https://diffusion-policy.cs.columbia.edu
+
+## Citation
+
+```bibtex
+@article{chi2024diffusionpolicy,
+	author = {Cheng Chi and Zhenjia Xu and Siyuan Feng and Eric Cousineau and Yilun Du and Benjamin Burchfiel and Russ Tedrake and Shuran Song},
+	title ={Diffusion Policy: Visuomotor Policy Learning via Action Diffusion},
+	journal = {The International Journal of Robotics Research},
+	year = {2024},
+}
+```