*Add an async shutdown event so that plugins can take action before the swarm is destroyed

src/index.ts

@@ -2,8 +2,8 @@ import { start as startRpc } from "./modules/rpc.js";
 import { start as startRelay } from "./modules/relay.js";
 import { start as startApp } from "./modules/app";
 import config from "./config.js";
-import { loadPlugins } from "./modules/plugin.js";
-import { start as startSwarm } from "./modules/swarm.js";
+import { getPluginAPI, loadPlugins } from "./modules/plugin.js";
+import { start as startSwarm, get as getSwarm } from "./modules/swarm.js";
 import * as bip39 from "@scure/bip39";
 import { wordlist } from "@scure/bip39/wordlists/english";
 
@@ -26,9 +26,12 @@ boot();
 process.on("uncaughtException", function (err) {
   console.log(`Caught exception: ${err.message} ${err.stack}`);
 });
-process.on("SIGINT", function () {
+
+async function shutdown() {
+  await getPluginAPI().emitAsync("core.shutdown");
+  await getSwarm().destroy();
   process.exit();
-});
-process.on("SIGTERM", function () {
-  process.exit();
-});
+}
+
+process.on("SIGINT", shutdown);
+process.on("SIGTERM", shutdown);