Friends system for app (#2958)

* Friends system for app

* Fix impl issues

* move friends to in-memory store

apps/labrinth/src/routes/v3/users.rs

@@ -300,6 +300,7 @@ pub struct EditUser {
     pub badges: Option<Badges>,
     #[validate(length(max = 160))]
     pub venmo_handle: Option<String>,
+    pub allow_friend_requests: Option<bool>,
 }
 
 pub async fn user_edit(
@@ -438,6 +439,20 @@ pub async fn user_edit(
                 .await?;
             }
 
+            if let Some(allow_friend_requests) = &user.allow_friend_requests {
+                sqlx::query!(
+                    "
+                    UPDATE users
+                    SET allow_friend_requests = $1
+                    WHERE (id = $2)
+                    ",
+                    allow_friend_requests,
+                    id as crate::database::models::ids::UserId,
+                )
+                .execute(&mut *transaction)
+                .await?;
+            }
+
             transaction.commit().await?;
             User::clear_caches(&[(id, Some(actual_user.username))], &redis)
                 .await?;