Feature Request: Support for nested JSON

[lyqht]

Context

At the moment, the github action only works for JSON that's 1 level depth, for example in vue-i18n-next

{
    "hello": "Hello, {name}!",
    "language": "Language",
    "description": "This is a wonderful world isn't it?"
  }

There are certain i18n plugins that rely on nested JSON. An example from refine

{
    "pages": {
        "login": {
            "title": "Melden Sie sich bei Ihrem Konto an",
            "signin": "Einloggen",
            "signup": "Anmelden",
            "divider": "oder",
            "fields": {
                "email": "Email",
                "password": "Passwort"
            },
            "errors": {
                "validEmail": "Ungültige E-Mail-Adresse"
            },
            "buttons": {
                "submit": "Anmeldung",
                "forgotPassword": "Passwort vergessen?",
                "noAccount": "Sie haben kein Konto?",
                "rememberMe": "Erinnere dich an mich"
            }
        },
...
}

The action should support these formats out of the box without modifying the props required for the action.