feat: add AsyncLocalStorage snapshot polyfill and zlib inflateSync support (#317)

- Added asyncStorage global polyfill with snapshot method implementation for AsyncLocalStorage
- Implemented zlib polyfill with inflateSync function using browserify-zlib
- Registered new polyfills in unenv preset configuration with proper aliases

Author: jcbsfilho

packages/unenv-preset/src/index.ts

@@ -16,6 +16,7 @@ export default {
     setInterval: `${polyfillsPath}/node/globals/set-interval.js`,
     clearInterval: `${polyfillsPath}/node/globals/clear-interval.js`,
     console: `${polyfillsPath}/node/globals/console.js`,
+    asyncStorage: `${polyfillsPath}/node/globals/async-storage.js`,
   },
   alias: {
     'azion/utils': 'azion/utils',
@@ -29,6 +30,7 @@ export default {
     string_decoder: 'string_decoder/lib/string_decoder.js',
     timers: 'timers-browserify/',
     util: `${polyfillsPath}/node/util.js`,
+    zlib: `${polyfillsPath}/node/zlib.js`,
   },
   external: ['node:async_hooks', 'node:fs/promises', 'node:stream', 'node:crypto'],
   polyfill: [

packages/unenv-preset/src/polyfills/node/globals/async-storage.js

@@ -0,0 +1,22 @@
+import async_hooks from 'async_hooks';
+// Implement snapshot for AsyncLocalStorage
+if (async_hooks.AsyncLocalStorage && !async_hooks.AsyncLocalStorage.prototype.snapshot) {
+  async_hooks.AsyncLocalStorage.prototype.snapshot = function () {
+    const store = this.getStore();
+    return () => store;
+  };
+}
+// Also add snapshot as a static method if needed
+if (async_hooks.AsyncLocalStorage && !async_hooks.AsyncLocalStorage.snapshot) {
+  async_hooks.AsyncLocalStorage.snapshot = () => {
+    return (fn, ...args) => {
+      if (typeof fn === 'function') {
+        const result = fn(...args);
+        return result;
+      }
+      return fn;
+    };
+  };
+}
+
+export default async_hooks.AsyncLocalStorage;

packages/unenv-preset/src/polyfills/node/zlib.js

@@ -0,0 +1,11 @@
+import { inflateSync as inflateSyncBrowserify } from 'browserify-zlib';
+import * as originalZlib from 'unenv/node/zlib';
+
+export function inflateSync(buffer, options = {}) {
+  return inflateSyncBrowserify(buffer, options);
+}
+
+export default {
+  ...originalZlib.default,
+  inflateSync,
+};