Extract rust snippets and reference them

snippets/rust/src/receive_payment.rs

@@ -0,0 +1,20 @@
+use std::sync::Arc;
+
+use anyhow::Result;
+use breez_sdk_core::*;
+
+async fn receive_payment(sdk: Arc<BreezServices>) -> Result<()> {
+    let res = sdk.receive_payment(
+        ReceivePaymentRequest {
+            amount_sats: 3000,
+            description: "Invoice for 3000 sats".into(),
+            cltv: None,
+            expiry: None,
+            opening_fee_params: None,
+            preimage: None,
+            use_description_hash: None
+        })
+        .await?;
+
+    Ok(())
+}