Small friends fixes (#4270)

* Ensure that fetch errors are properly propagated

* Handle user not found errors better in add_friend

* Cargo fmt

* Introduce new LabrinthError returnable by fetch_advanced

* Allow enter key to send a friend request

packages/app-lib/Cargo.toml

@@ -35,6 +35,7 @@ bytemuck.workspace = true
 rgb.workspace = true
 phf.workspace = true
 itertools.workspace = true
+derive_more = { workspace = true, features = ["display"] }
 
 chrono = { workspace = true, features = ["serde"] }
 daedalus.workspace = true