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/rust/src/closed_channel.rs

@@ -0,0 +1,32 @@
+use std::sync::Arc;
+
+use anyhow::Result;
+use breez_sdk_core::*;
+
+async fn prepare_redeem_onchain_funds(sdk: Arc<BreezServices>, fee_rate: u32) -> Result<()> {
+    // ANCHOR: prepare-redeem-onchain-funds
+    let sat_per_vbyte = fee_rate;
+    let destination_address = String::from("bc1..");
+    sdk.prepare_redeem_onchain_funds(PrepareRedeemOnchainFundsRequest {
+        sat_per_vbyte,
+        to_address: destination_address,
+    })
+    .await?;
+    // ANCHOR_END: prepare-redeem-onchain-funds
+    Ok(())
+}
+
+async fn redeem_onchain_funds(
+    sdk: Arc<BreezServices>,
+    sat_per_vbyte: u32,
+    to_address: String,
+) -> Result<()> {
+    // ANCHOR: redeem-onchain-funds
+    sdk.redeem_onchain_funds(RedeemOnchainFundsRequest {
+        sat_per_vbyte,
+        to_address,
+    })
+    .await?;
+    // ANCHOR_END: redeem-onchain-funds
+    Ok(())
+}