fix(log): use Swift OSLog instead of oslog Rust binding (#262)

plugins/log/ios/Sources/LogPlugin.swift

@@ -0,0 +1,13 @@
+import UIKit
+import Tauri
+import SwiftRs
+
+@_cdecl("tauri_log")
+func log(level: Int, message: UnsafePointer<SRString>) {
+	switch level {
+		case 1: Logger.debug(message.pointee.to_string())
+		case 2: Logger.info(message.pointee.to_string())
+		case 3: Logger.error(message.pointee.to_string())
+		default: break
+	}
+}