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/ReceiveOnchain.swift

@@ -0,0 +1,48 @@
+//
+//  ReceiveOnchain.swift
+//
+//
+//  Created by ruben on 14/11/2023.
+//
+
+import Foundation
+import BreezSDK
+
+func generateReceiveOnchainAddress(sdk: BlockingBreezServices) -> String? {
+    // ANCHOR: generate-receive-onchain-address
+    let swapInfo = try? sdk.receiveOnchain(req: ReceiveOnchainRequest())
+
+    // Send your funds to the bellow bitcoin address
+    let address = swapInfo?.bitcoinAddress
+    // ANCHOR_END: generate-receive-onchain-address
+    
+    return address
+}
+
+func getSwapInProgress(sdk: BlockingBreezServices) -> SwapInfo? {
+    // ANCHOR: in-progress-swap
+    let swapInfo = try? sdk.inProgressSwap()
+    // ANCHOR_END: in-progress-swap
+    return swapInfo
+}
+
+func listRefundables(sdk:BlockingBreezServices) -> [SwapInfo]? {
+    // ANCHOR: list-refundables
+    let refundables = try? sdk.listRefundables()
+    // ANCHOR_END: list-refundables
+    return refundables
+}
+func executeRefund(sdk: BlockingBreezServices, refundables: SwapInfo,satPerVbyte: UInt32) -> RefundResponse? {
+    // ANCHOR: execute-refund
+    let destinationAddress = "..."
+    let response = try? sdk.refund(req: RefundRequest(swapAddress: refundables.bitcoinAddress, toAddress: destinationAddress, satPerVbyte: satPerVbyte))
+    // ANCHOR_END: execute-refund
+    return response
+}
+
+func getChannelOpeningFees(sdk: BlockingBreezServices, amountMsat: UInt64) -> OpenChannelFeeResponse? {
+    // ANCHOR: get-channel-opening-fees
+    let response = try? sdk.openChannelFee(req: OpenChannelFeeRequest(amountMsat: amountMsat))
+    // ANCHOR_END: get-channel-opening-fees
+    return response
+}