fix: not allow install multiple package manager (pnpm#161)

Author: BlackHole1

.gitignore

@@ -1,13 +1,11 @@
-node_modules
-*.log
-/dist/*
-!/dist/index.js
-!/dist/pnpm.cjs
-!/dist/worker.js
-tmp
-temp
-*.tmp
-*.temp
-tmp.*
-temp.*
-.pnpm-store
+/nbproject/
+/.idea/*
+*.tmlanguage.cache
+*.tmPreferences.cache
+*.stTheme.cache
+*.sublime-workspace
+*.sublime-project
+node_modules/
+bin/
+obj/
+.vs/