Add link to Ignition docs in sample projects

Author: fvictorio

packages/hardhat-core/sample-projects/javascript-esm/ignition/modules/Lock.js

@@ -1,3 +1,6 @@
+// This setup uses Hardhat Ignition to manage smart contract deployments.
+// Learn more about it at https://hardhat.org/ignition
+
 import { buildModule } from "@nomicfoundation/hardhat-ignition/modules";
 
 const JAN_1ST_2030 = 1893456000;

packages/hardhat-core/sample-projects/javascript/ignition/modules/Lock.js

@@ -1,3 +1,6 @@
+// This setup uses Hardhat Ignition to manage smart contract deployments.
+// Learn more about it at https://hardhat.org/ignition
+
 const { buildModule } = require("@nomicfoundation/hardhat-ignition/modules");
 
 const JAN_1ST_2030 = 1893456000;

packages/hardhat-core/sample-projects/typescript-viem/ignition/modules/Lock.ts

@@ -1,3 +1,6 @@
+// This setup uses Hardhat Ignition to manage smart contract deployments.
+// Learn more about it at https://hardhat.org/ignition
+
 import { buildModule } from "@nomicfoundation/hardhat-ignition/modules";
 import { parseEther } from "viem";
 

packages/hardhat-core/sample-projects/typescript/ignition/modules/Lock.ts

@@ -1,3 +1,6 @@
+// This setup uses Hardhat Ignition to manage smart contract deployments.
+// Learn more about it at https://hardhat.org/ignition
+
 import { buildModule } from "@nomicfoundation/hardhat-ignition/modules";
 
 const JAN_1ST_2030 = 1893456000;