NUT-06: add time field (#159)

06.md

@@ -38,6 +38,7 @@ With the mint's response being of the form `GetInfoResponse`:
     }
   ],
   "motd": "Message to display to users.",
+  "time": 1725304480,
   "nuts": {
     "4": {
       "methods": [
@@ -87,6 +88,7 @@ With the mint's response being of the form `GetInfoResponse`:
 - (optional) `description_long` is a long description that can be shown in an additional field.
 - (optional) `contact` is an array of contact objects to reach the mint operator. A contact object consists of two fields. The `method` field denotes the contact method (like "email"), the `info` field denotes the identifier (like "[email protected]").
 - (optional) `motd` is the message of the day that the wallet must display to the user. It should only be used to display important announcements to users, such as scheduled maintenances.
+- (optional) `time` is the current time set on the server. The value is passed as a Unix timestamp integer.
 - (optional) `nuts` indicates each NUT specification that the mint supports and its settings. The settings are defined in each NUT separately.
 
 With curl: