feat(api): Add NodeInfo 2.1

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2604>

api/tests/instance/test_nodeinfo.py

@@ -6,7 +6,7 @@ from funkwhale_api import __version__ as api_version
 from funkwhale_api.music.utils import SUPPORTED_EXTENSIONS
 
 
-def test_nodeinfo_default(api_client):
+def test_nodeinfo_20(api_client):
     url = reverse("api:v1:instance:nodeinfo-2.0")
     response = api_client.get(url)
 
@@ -89,3 +89,73 @@ def test_nodeinfo_default(api_client):
     }
 
     assert response.data == expected
+
+
+def test_nodeinfo_21(api_client):
+    url = reverse("api:v2:instance:nodeinfo-2.1")
+    response = api_client.get(url)
+
+    expected = {
+        "version": "2.1",
+        "software": OrderedDict(
+            [
+                ("name", "funkwhale"),
+                ("version", api_version),
+                ("repository", "https://dev.funkwhale.audio/funkwhale/funkwhale"),
+                ("homepage", "https://funkwhale.audio"),
+            ]
+        ),
+        "protocols": ["activitypub"],
+        "services": OrderedDict([("inbound", ["atom1.0"]), ("outbound", ["atom1.0"])]),
+        "openRegistrations": False,
+        "usage": {
+            "users": OrderedDict(
+                [("total", 0), ("activeHalfyear", 0), ("activeMonth", 0)]
+            ),
+            "localPosts": 0,
+            "localComments": 0,
+        },
+        "metadata": {
+            "actorId": "https://test.federation/federation/actors/service",
+            "private": False,
+            "shortDescription": "",
+            "longDescription": "",
+            "contactEmail": "",
+            "nodeName": "",
+            "banner": None,
+            "defaultUploadQuota": 1000,
+            "supportedUploadExtensions": SUPPORTED_EXTENSIONS,
+            "allowList": {"enabled": False, "domains": None},
+            "funkwhaleSupportMessageEnabled": True,
+            "instanceSupportMessage": "",
+            "usage": OrderedDict(
+                [
+                    ("favorites", OrderedDict([("tracks", {"total": 0})])),
+                    ("listenings", OrderedDict([("total", 0)])),
+                    ("downloads", OrderedDict([("total", 0)])),
+                ]
+            ),
+            "location": "",
+            "languages": ["en"],
+            "features": ["channels", "podcasts", "federation"],
+            "content": OrderedDict(
+                [
+                    (
+                        "local",
+                        OrderedDict(
+                            [
+                                ("artists", 0),
+                                ("releases", 0),
+                                ("recordings", 0),
+                                ("hoursOfContent", 0),
+                            ]
+                        ),
+                    ),
+                    ("topMusicCategories", []),
+                    ("topPodcastCategories", []),
+                ]
+            ),
+        },
+    }
+
+    assert response.data == expected