README.md for examples/ (#106)

* examples readme

* itai nits

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Co-authored-by: Marton Havasi <marton@meta.com>

Author: mhavasi

examples/README.md

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+# Flow matching examples
+
+## Image
+
+[Flow matching on images.](image/) Pixel space image generation using continuous flow matching.
+
+## Text
+
+[Flow matching on text.](text/) Text generation using discrete flow matching.
+
+## Notebooks
+
+| Notebook | Description |
+| --- | --- |
+| [standalone_flow_matching.ipynb](standalone_flow_matching.ipynb) | A concise flow matching example built in pure PyTorch. |
+| [standalone_discrete_flow_matching.ipynb](standalone_discrete_flow_matching.ipynb) | A concise discrete flow matching example built in pure PyTorch. |
+| [2d_flow_matching.ipynb](2d_flow_matching.ipynb) | 2D flow matching example on the checkerboard dataset using the flow_matching library. |
+| [2d_discrete_flow_matching.ipynb](2d_discrete_flow_matching.ipynb) | 2D discrete flow matching example on the checkerboard dataset using the flow_matching library. |
+| [2d_riemannian_flow_matching_flat_torus.ipynb](2d_riemannian_flow_matching_flat_torus.ipynb) | 2D Riemannian flow matching on a flat torus on the checkerboard dataset and the flow_matching library. |
+| [2d_riemannian_flow_matching_sphere.ipynb](2d_riemannian_flow_matching_sphere.ipynb) | 2D Riemannian flow matching on a sphere on the checkerboard dataset and the flow_matching library. |
+