Final cleanup: remove executable and update .gitignore

Co-authored-by: notfolder <20558197+notfolder@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -6,3 +6,5 @@ gitlab/
 *.log
 *.log.*
 github-mcp-server.cmd
+github-mcp-server
+github-mcp-server-exe