docs: use uv for installing

Author: ryoppippi

README.md

@@ -28,20 +28,20 @@ StackOne AI provides a unified interface for accessing various SaaS tools throug
 ### Basic Installation
 
 ```bash
-pip install stackone-ai
+uv add stackone-ai
 ```
 
 ### Optional Features
 
 ```bash
 # Install with MCP server support (requires Python 3.10+)
-pip install 'stackone-ai[mcp]'
+uv add 'stackone-ai[mcp]'
 
 # Install with CrewAI examples (requires Python 3.10+)
-pip install 'stackone-ai[examples]'
+uv add 'stackone-ai[examples]'
 
 # Install everything
-pip install 'stackone-ai[mcp,examples]'
+uv add 'stackone-ai[mcp,examples]'
 ```
 
 ## Quick Start