rename index-sr file and add deprecation notice (#83)

Author: evgeniko

README.md

@@ -4,6 +4,8 @@
 
 This project demonstrates the use of the Wormhole TS-SDK to facilitate token transfers between different blockchain networks, after performing a deployment of the [Native Token Transfer](https://docs.wormhole.com/wormhole/native-token-transfers/overview) framework. Before running the script, you need to set up the necessary configurations and provide your deployment details.
 
+> **⚠️ Important:** Standard relaying (SR) is **deprecated**. The `index-sr.ts` example is provided for reference only. For production use, we strongly recommend using the Executor route (`index-executor.ts`) which provides automatic relaying and a better user experience.
+
 ## Prerequisites
 
 Ensure you have the following installed on your system:
@@ -104,12 +106,14 @@ executorConfig.referrerFee = {
 
 This project provides two different NTT transfer examples:
 
-### 1. Basic NTT Transfer (`index.ts`)
+### 1. Basic NTT Transfer (`index-sr.ts`) ⚠️ DEPRECATED
+
+> **⚠️ Deprecation Notice:** Standard relaying (SR) is deprecated. We strongly recommend using the Executor route instead (see section 2 below) for automatic relaying, which provides a better user experience and is the recommended approach going forward.
 
-Simple NTT transfer between chains:
+Simple NTT transfer between chains using standard relaying:
 
 ```bash
-npx ts-node src/index.ts
+npx ts-node src/index-sr.ts
 ```
 
 ### 2. NTT Executor Transfer (`index-executor.ts`)
@@ -133,7 +137,7 @@ const dst = wh.getChain("Sepolia");
 ```
 
 ### Transfer Amount
-To modify the amount of tokens being transferred change the following line in the ⁠index.ts file:
+To modify the amount of tokens being transferred change the following line in the `index-sr.ts` or `index-executor.ts` file:
 ```typescript
 const amt = amount.units(
   amount.parse("1", await srcNtt.getTokenDecimals())