feat: rewrite the nip-4e implementation (#1)

Make NIP-4e a core feature, not an optional feature.

Note:
- The UI is broken and needs to be updated in a separate PR.

Reviewed-on: #1

crates/device/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "device"
+version.workspace = true
+edition.workspace = true
+publish.workspace = true
+
+[dependencies]
+common = { path = "../common" }
+state = { path = "../state" }
+
+gpui.workspace = true
+nostr-sdk.workspace = true
+
+anyhow.workspace = true
+itertools.workspace = true
+smallvec.workspace = true
+smol.workspace = true
+log.workspace = true
+flume.workspace = true
+serde.workspace = true
+serde_json.workspace = true