readme: add screenshot

Added a screenshot to the README.

Author: mufeedvh

README.md

@@ -5,6 +5,8 @@
 
 `gitctx` is an MCP server that gives agents and IDE assistants targeted, up-to-date access to GitHub repositories. Code, Issues, PRs, Commits, Releases, everything. This is an open-source alternative to Amp's [Librarian](https://ampcode.com/news/librarian) and was inspired by the same.
 
+![Screenshot 2026-02-14 at 12 48 59 AM](https://github.com/user-attachments/assets/e2a3ccca-3e9c-43e8-8b03-2f44ce69155b)
+
 ## Why gitctx
 
 - Focused GitHub exploration primitives instead of generic web scraping