chore: update readme (#20)

Author: KMnO4-158

README.md

@@ -1,3 +1,42 @@
 # Breeze - A Modern Sphinx Theme
 
-A modern Sphinx theme built with TypeScript and Vite.
+A modern Sphinx theme built with TypeScript and Vite. 
+
+
+
+[demo](https://sphinx-breeze-theme.readthedocs.io/en/stable/)
+
+## Installation
+
+Install Breeze from [PyPI](https://pypi.org/project/sphinx-breeze-theme/):
+
+pip
+```bash
+pip install sphinx-breeze-theme
+```
+
+uv
+```bash
+uv add --dev sphinx-breeze-theme
+```
+
+## Setup
+
+Update ``conf.py``:
+```python
+html_theme = "breeze"
+```
+
+Customise header:
+```python
+html_context = {
+    "github_user": "aksiome",
+    "github_repo": "breeze",
+    ...
+}
+```
+
+## Documentation
+
+- official sphinx [tutorial](https://www.sphinx-doc.org/en/master/tutorial/)
+- MyST markdown [documentation](https://myst-parser.readthedocs.io/)