chore: gitignore stray example binaries (drop leaked basic artifact)

`go build` run inside examples/basic left an 8.5MB Mach-O binary `basic` at
the repo root (untracked, not ignored). Removed it from the worktree and added
gitignore rules so example-build artifacts don't get committed.

Author: Patel230

.gitignore

@@ -7,6 +7,10 @@ coverage.txt
 # Build output
 bin/
 dist/
+# Stray example binaries (e.g. `go build` run inside examples/* leaving the binary at repo root)
+/basic
+/examples/*/main
+examples/**/*.bin
 
 # IDE
 .idea/