snippets for sweeping funds on channel closes. (#110)

* Bump breez-sdk snippet dependency to 0.2.12

* Bump the Swift snippet macos version to v13

* Bump breez-sdk snippet dependency to 0.2.14

* swiftformat

* redeem_onchain_funds example

* Document swapinfo fields

* example on how to use local breez-sdk package

* fix dart example

* yarn lint

* remove swapinfo docs

* dart fixup

---------

Co-authored-by: ok300 <106775972+ok300@users.noreply.github.com>

snippets/kotlin_mpp_lib/shared/src/commonMain/kotlin/com/example/kotlinmpplib/ClosedChannel.kt

@@ -0,0 +1,30 @@
+package com.example.kotlinmpplib
+
+import breez_sdk.*
+class ClosedChannel {
+    fun prepareRedeemOnchainFunds(sdk: BlockingBreezServices, feeRate: UInt) {
+        // ANCHOR: prepare-redeem-onchain-funds 
+         val satPerVbyte = feeRate
+         var destinationAddress = "bc1.."
+         try {
+            val req = PrepareRedeemOnchainFundsRequest(destinationAddress, satPerVbyte)
+            val prepareRedeemOnchainFundsResp = sdk.prepareRedeemOnchainFunds(req)
+         }
+         catch (e: Exception) {
+            // handle error
+        }
+        // ANCHOR_END: prepare-redeem-onchain-funds 
+    }
+
+    fun redeemOnchainFunds(sdk: BlockingBreezServices, satPerVbyte: UInt, toAddress: String) {
+        // ANCHOR: redeem-onchain-funds 
+         try {
+            val req = RedeemOnchainFundsRequest(toAddress, satPerVbyte)
+            val redeemOnchainFundsResp = sdk.redeemOnchainFunds(req)
+         }
+         catch (e: Exception) {
+            // handle error
+        }
+        // ANCHOR_END: redeem-onchain-funds
+    }
+}