chore: rename docs 'readme.md' to 'README.md'

every other README in this repo is capitalized

Signed-off-by: Nathan Weinberg <nweinber@redhat.com>

docs/README.md

@@ -0,0 +1,19 @@
+# Llama Stack Documentation
+
+Here's a collection of comprehensive guides, examples, and resources for building AI applications with Llama Stack. For the complete documentation, visit our [ReadTheDocs page](https://llama-stack.readthedocs.io/en/latest/index.html).
+
+## Render locally
+
+From the llama-stack root directory, run the following command to render the docs locally:
+```bash
+uv run --group docs sphinx-autobuild docs/source docs/build/html --write-all
+```
+You can open up the docs in your browser at http://localhost:8000
+
+## Content
+
+Try out Llama Stack's capabilities through our detailed Jupyter notebooks:
+
+* [Building AI Applications Notebook](./getting_started.ipynb) - A comprehensive guide to building production-ready AI applications using Llama Stack
+* [Benchmark Evaluations Notebook](./notebooks/Llama_Stack_Benchmark_Evals.ipynb) - Detailed performance evaluations and benchmarking results
+* [Zero-to-Hero Guide](./zero_to_hero_guide) - Step-by-step guide for getting started with Llama Stack