Updated pip minimum version + added pip badge (#180)

Author: stex2005

README.md

@@ -4,6 +4,7 @@
 ![Static Badge](https://img.shields.io/badge/ROS2-Available-green)
 ![Static Badge](https://img.shields.io/badge/License-Apache%202.0-blue)
 ![Python](https://img.shields.io/badge/python-3.10%2B-blue)
+![pip](https://img.shields.io/badge/pip-23.0%2B-blue)
 ![Dev Container](https://img.shields.io/badge/Dev-Container%20Ready-blue)
 ![GitHub Repo stars](https://img.shields.io/github/stars/robotmcp/ros-mcp-server?style=social)
 ![GitHub last commit](https://img.shields.io/github/last-commit/robotmcp/ros-mcp-server)

docs/installation.md

@@ -44,6 +44,10 @@ For users who prefer traditional pip installation:
 ```bash
 pip install ros-mcp
 ```
+> **⚠️ Important**: This package requires pip version 23.0 or higher. Check your pip version with `pip --version` and upgrade if needed:
+```bash
+python3 -m pip install --upgrade pip
+```
 
 ### Option B: Install from Source
 For developers or advanced users who need to modify the source code, see [Installation from Source](installation-from-source.md).
@@ -62,6 +66,11 @@ pipx install .
 
 > **Note**: This also works with regular pip: `pip install .`
 
+> **⚠️ Important**: This package requires pip version 23.0 or higher. Check your pip version with `pip --version` and upgrade if needed:
+```bash
+python3 -m pip install --upgrade pip
+```
+
 </details>
 
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