feat: 🎸 add application update signature configuration

新增程序更新签名配置，用于保证更新包的完整性与安全性

src-tauri/Cargo.toml

@@ -23,3 +23,7 @@ tauri-plugin-opener = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 
+[target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
+tauri-plugin-single-instance = "2"
+tauri-plugin-updater = "2"
+