Flutter VSCode configurations

launch.json

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Flutter Free",
      "request": "launch",
      "type": "dart",
      "args": [
        "--flavor",
        "free"
      ]
    },
    {
      "name": "Flutter Pro",
      "request": "launch",
      "type": "dart",
      "program": "lib/main_pro.dart",
      "args": [
        "--flavor",
        "pro"
      ]
    }
  ]
}