feat(docs): add usage statistics to nodeinfo specs

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2629>

changes/changelog.d/nodeinfo-usage.doc

@@ -0,0 +1 @@
+Updated nodeinfo spec to include usage statistics.

docs/specs/nodeinfo21/index.md

@@ -37,15 +37,9 @@ The NodeInfo endpoint must contain all mandatory elements listed in the specific
 `longDescription` (String)
 : A longer description of the pod
 
-`rules` (String)
-: A collection of rules users of the pod must abide by
-
 `contactEmail` (Email address)
 : The email address of the pod administrator
 
-`terms` (String)
-: The terms of use associated with the pod
-
 `nodeName`(String)
 : The name of the pod
 
@@ -140,16 +134,19 @@ Example response:
       "activeMonth": 0
     },
     "localPosts": 0,
-    "localComments": 0
+    "localComments": 0,
+    "listenings": 0,
+    "downloads": 0,
+    "favorites": {
+      "tracks": 0
+    }
   },
   "metadata": {
     "actorId": "string",
     "private": true,
     "shortDescription": "string",
     "longDescription": "string",
-    "rules": "string",
     "contactEmail": "user@example.com",
-    "terms": "string",
     "nodeName": "string",
     "banner": "string",
     "defaultUploadQuota": 0,

docs/specs/nodeinfo21/schema.yml

@@ -444,6 +444,18 @@ components:
             localComments:
               type: integer
               minimum: 0
+            listenings:
+              type: integer
+              minimum: 0
+            downloads:
+              type: integer
+              minimum: 0
+            favorites:
+              type: object
+              properties:
+                tracks:
+                  type: integer
+                  minimum: 0
         metadata:
           type: object
           properties:
@@ -456,13 +468,9 @@ components:
               type: string
             longDescription:
               type: string
-            rules:
-              type: string
             contactEmail:
               type: string
               format: email
-            terms:
-              type: string
             nodeName:
               type: string
             banner: