Friends system for app (#2958)

* Friends system for app

* Fix impl issues

* move friends to in-memory store

Cargo.lock

@@ -280,13 +280,14 @@ dependencies = [
 
 [[package]]
 name = "actix-ws"
-version = "0.2.5"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "535aec173810be3ca6f25dd5b4d431ae7125d62000aa3cbae1ec739921b02cf3"
+checksum = "a3a1fb4f9f2794b0aadaf2ba5f14a6f034c7e86957b458c506a8cb75953f2d99"
 dependencies = [
  "actix-codec",
  "actix-http",
  "actix-web",
+ "bytestring",
  "futures-core",
  "tokio 1.40.0",
 ]