docs: Add screenshot to README

- Add screenshot_01.png showing Parsec's TUI interface
- Display parsec directory navigation and help command
- Resize image to 800px width for better web display
- Add descriptive caption for the interface

Author: Cod-e-Codes

README.md

@@ -2,6 +2,12 @@
 
 Parsec is a fast, terminal-based file inspector that provides immediate summaries of source code files. Built for developers who need rapid context-aware code browsing.
 
+## Screenshot
+
+<img src="screenshot_01.png" alt="Parsec TUI Interface" width="800">
+
+*Parsec's split-screen interface showing file navigation and executable help display*
+
 ## Features
 
 - Split-screen interface with file tree and detailed summary view