Add helper for Swift SDK

Author: simolus3

PowerSyncKotlin/src/appleMain/kotlin/com/powersync/SDK.kt

@@ -2,6 +2,8 @@
 
 package com.powersync
 
+import com.powersync.sync.ConnectionMethod
+
 /**
  * Helper class designed to bridge SKIEE methods and allow them to throw
  * `PowerSyncException`. This is necessary because these exceptions cannot
@@ -13,3 +15,16 @@ package com.powersync
  */
 @Throws(PowerSyncException::class)
 public fun throwPowerSyncException(exception: PowerSyncException): Unit = throw exception
+
+/**
+ * Creates a [ConnectionMethod] from a simple boolean, because creating the actual instance with
+ * the default constructor is not possible from Swift due to an optional argument with an internal
+ * default value.
+ */
+@OptIn(ExperimentalPowerSyncAPI::class)
+public fun createConnectionMethod(webSocket: Boolean): ConnectionMethod =
+    if (webSocket) {
+        ConnectionMethod.WebSocket()
+    } else {
+        ConnectionMethod.Http
+    }