### roles

#### GET /roles
```json
[
    {
        "id": 1,
        "permissions": [
            "Observateur"
        ],
        "role_name": "Observateur"
    },
    {
        "id": 2,
        "permissions": [
            "ScoEntrepriseView",
            "ScoEtudAddAnnotations",
            "ScoAbsAddBillet",
            "ScoAbsChange",
            "UsersView",
            "Observateur",
            "EnsView",
            "ScoView"
        ],
        "role_name": "Ens"
    },
    "..."
]
```