Stun fix (#18)

* make easytier-core a lib
* add stun command to easytier cli
* fix stun test for musl

easytier-core/Cargo.toml

@@ -8,8 +8,8 @@ rust-version = "1.75"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [lib]
-name = "easytier_rpc"
-path = "src/rpc/lib.rs"
+name = "easytier_core"
+test = false
 
 [dependencies]
 tracing = { version = "0.1", features = ["log"] }
@@ -87,8 +87,15 @@ public-ip = { version = "0.2", features = ["default"] }
 
 clap = { version = "4.4", features = ["derive"] }
 
+async-recursion = "1.0.5"
+
 [target.'cfg(windows)'.dependencies]
-windows-sys = { version = "0.52", features = ["Win32_Networking_WinSock", "Win32_NetworkManagement_IpHelper", "Win32_Foundation", "Win32_System_IO"] }
+windows-sys = { version = "0.52", features = [
+    "Win32_Networking_WinSock",
+    "Win32_NetworkManagement_IpHelper",
+    "Win32_Foundation",
+    "Win32_System_IO",
+] }
 
 [build-dependencies]
 tonic-build = "0.10"