chore: Add status badges to README

Included badges for GitHub Actions workflow and license status. This enhances the README's informativeness and provides quick insights into build status and licensing.

Author: jkawamoto

README.md

@@ -1,4 +1,6 @@
 # Youtube Transcript MCP Server
+[![Python Application](https://github.com/jkawamoto/mcp-youtube-transcript/actions/workflows/python-app.yaml/badge.svg)](https://github.com/jkawamoto/mcp-youtube-transcript/actions/workflows/python-app.yaml)
+[![GitHub License](https://img.shields.io/github/license/jkawamoto/mcp-youtube-transcript)](https://github.com/jkawamoto/mcp-youtube-transcript/blob/main/LICENSE)
 
 This MCP server retrieves transcripts for given YouTube video URLs.