feat: custom gossip implementation (#181)

* .

* rename global to app_state

* refactor event tracker

* gossip

* .

* .

crates/app_state/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "app_state"
+version.workspace = true
+edition.workspace = true
+publish.workspace = true
+
+[dependencies]
+nostr-sdk.workspace = true
+nostr-lmdb.workspace = true
+dirs.workspace = true
+smol.workspace = true
+flume.workspace = true
+log.workspace = true
+anyhow.workspace = true
+
+whoami = "1.5.2"
+rustls = "0.23.23"