move swift examples (#100)

* move swift examples

* swift workflow

* fixup

* rewirte gettingStarted

* add README for swift

* update fiat examples and addresss feedback

snippets/swift/BreezSDKExamples/Sources/GettingStarted.swift

@@ -0,0 +1,51 @@
+//
+//  GettingStarted.swift
+//  
+//
+//  Created by ruben on 13/11/2023.
+//
+
+import BreezSDK
+
+// ANCHOR: init-sdk
+// SDK events listener
+class SDKListener: EventListener {
+  func onEvent(e: BreezEvent) {
+    print("received event ", e)
+  }
+}
+
+func gettingStarted() throws -> BlockingBreezServices? {
+    // Create the default config
+    let seed = try? mnemonicToSeed(phrase: "<mnemonic words>")
+    
+    let inviteCode = "<invite code>"
+    let apiKey = "<api key>"
+    var config = defaultConfig(envType: EnvironmentType.production, apiKey: apiKey,
+        nodeConfig: NodeConfig.greenlight(
+            config: GreenlightNodeConfig(partnerCredentials: nil, inviteCode: inviteCode)))
+
+    // Customize the config object according to your needs
+    config.workingDir = "path to an existing directory"
+
+    
+    // Connect to the Breez SDK make it ready for use
+    guard seed != nil else {
+        return nil
+    }
+    let sdk = try? connect(config: config, seed: seed!, listener: SDKListener())
+    
+    return sdk
+}
+// ANCHOR_END: init-sdk
+
+func gettingStartedNodeInfo(sdk: BlockingBreezServices) {
+    // ANCHOR: fetch-balance
+    if let nodeInfo = try? sdk.nodeInfo() {
+        let lnBalance = nodeInfo.channelsBalanceMsat
+        let onchainBalance = nodeInfo.onchainBalanceMsat
+    }
+    // ANCHOR_END: fetch-balance
+}
+
+