fix: Add CLI entry point and update gitignore to only ignore binary output

Author: thanhdevapp

cmd/dev-cleaner/main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	cmd "github.com/thanhdevapp/dev-cleaner/cmd/root"
+)
+
+func main() {
+	cmd.Execute()
+}