docs(readme): drop experimental warnings, add centered Redis logo header

- Remove the orange shields.io "Status: Experimental" badge and the
  matching blockquote callout. The Experimental tier note still lives
  in the docs site for context; the README no longer leads with it.
- Replace the plain `# sql-redis` title with a centered hero block
  matching the redisvl README pattern: Redis logo (canonical SVG from
  `redis/redis-vl-python/docs/_static/`) + `<h1>sql-redis</h1>` +
  one-line tagline + a Documentation / GitHub / PyPI link bar.
- Surface the published docs URL prominently right after the hero so
  new readers land on the live site before scrolling.
- Move the local docs preview command (`make docs-serve`) into the
  existing Development section where the other `make` targets live.

Author: nkanu17

README.md

@@ -1,19 +1,20 @@
-# sql-redis
+<div align="center">
+    <img width="300" src="https://raw.githubusercontent.com/redis/redis-vl-python/main/docs/_static/Redis_Logo_Red_RGB.svg" alt="Redis">
+    <h1>sql-redis</h1>
+    <p><strong>SQL on top of RediSearch and RedisVL indexes</strong></p>
+</div>
 
-[![Status: Experimental](https://img.shields.io/badge/status-experimental-orange)](https://redis.io/ai-hub/)
+<div align="center">
 
-A SQL-to-Redis translator that converts SQL `SELECT` statements into Redis `FT.SEARCH` and `FT.AGGREGATE` commands. Query Redis collections with familiar SQL on top of RediSearch and RedisVL indexes.
+**[Documentation](https://redis-developer.github.io/sql-redis/)** • **[GitHub](https://github.com/redis-developer/sql-redis)** • **[PyPI](https://pypi.org/project/sql-redis/)**
 
-> **Status: Experimental.** sql-redis is in the [Redis AI Hub](https://redis.io/ai-hub/) under the Experimental tier. The API can change between minor releases. Not yet production-ready; we are validating the design and the SQL surface in real use.
+</div>
 
-Full documentation: **<https://redis-developer.github.io/sql-redis/>** (Diataxis-aligned: concepts, how-to guides, API reference, examples). Built with MkDocs Material from [`docs/`](docs/) and deployed to GitHub Pages on every push to `main`.
+---
 
-Build the site locally:
+A SQL-to-Redis translator that converts SQL `SELECT` statements into Redis `FT.SEARCH` and `FT.AGGREGATE` commands. Query Redis collections with familiar SQL on top of RediSearch and RedisVL indexes.
 
-```bash
-uv sync --group docs
-make docs-serve   # http://localhost:8000
-```
+Full docs (concepts, how-to guides, API reference, examples) are at <https://redis-developer.github.io/sql-redis/>.
 
 ## Install
 
@@ -440,6 +441,7 @@ make install       # uv sync --all-extras
 make test          # requires Docker for testcontainers
 make test-cov      # with coverage report
 make lint          # format + mypy
+make docs-serve    # uv sync --group docs && preview at http://localhost:8000
 ```
 
 ## Testing philosophy