feat: update .gitignore to include bun.lock and benchmark files; enhance README with usage instructions for local execution

Author: codingstark-dev

.gitignore

@@ -1,6 +1,7 @@
 # dependencies (bun install)
 node_modules
 .cursor
+bun.lock
 # output
 out
 dist
@@ -9,7 +10,10 @@ test
 # code coverage
 coverage
 *.lcov
-
+benchmark
+benchmark.md
+benchmark-results.json
+benchmark-results-comprehensive.json
 # logs
 logs
 _.log

README.md

@@ -81,6 +81,10 @@ bunkill
 # Scan specific directory
 bunkill --dir /path/to/projects
 
+# Using without global installation
+bunx bunkill                    # Via Bun
+npx bunkill                     # Via npm
+
 # Quick scan with immediate results
 bunkill --depth 1
 ```