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/ReceivePayment.swift

@@ -0,0 +1,18 @@
+//
+//  ReceivePayment.swift
+//  
+//
+//  Created by ruben on 13/11/2023.
+//
+
+import BreezSDK
+
+func receivePayment(sdk: BlockingBreezServices) -> ReceivePaymentResponse? {
+    // ANCHOR: receive-payment
+    let repsonse = try? sdk.receivePayment(
+        req: ReceivePaymentRequest(
+            amountMsat: 3_000_000,
+            description: "Invoice for 3 000 000 sats"))
+    // ANCHOR_END: receive-payment
+    return repsonse
+}