Fix following groups + Add interface to manage followers

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/graphql/followers.ts

@@ -0,0 +1,49 @@
+import gql from "graphql-tag";
+
+export const GROUP_FOLLOWERS = gql`
+  query(
+    $name: String!
+    $followersPage: Int
+    $followersLimit: Int
+    $approved: Boolean
+  ) {
+    group(preferredUsername: $name) {
+      id
+      preferredUsername
+      name
+      domain
+      followers(
+        page: $followersPage
+        limit: $followersLimit
+        approved: $approved
+      ) {
+        total
+        elements {
+          id
+          actor {
+            id
+            preferredUsername
+            name
+            domain
+            avatar {
+              id
+              url
+            }
+          }
+          approved
+          insertedAt
+          updatedAt
+        }
+      }
+    }
+  }
+`;
+
+export const UPDATE_FOLLOWER = gql`
+  mutation UpdateFollower($id: ID!, $approved: Boolean) {
+    updateFollower(id: $id, approved: $approved) {
+      id
+      approved
+    }
+  }
+`;