Move @tursodatabase/sync code to sync/javascript

sync/javascript/wasi-worker-browser.mjs

@@ -0,0 +1,32 @@
+import { instantiateNapiModuleSync, MessageHandler, WASI } from '@napi-rs/wasm-runtime'
+
+const handler = new MessageHandler({
+  onLoad({ wasmModule, wasmMemory }) {
+    const wasi = new WASI({
+      print: function () {
+        // eslint-disable-next-line no-console
+        console.log.apply(console, arguments)
+      },
+      printErr: function() {
+        // eslint-disable-next-line no-console
+        console.error.apply(console, arguments)
+      },
+    })
+    return instantiateNapiModuleSync(wasmModule, {
+      childThread: true,
+      wasi,
+      overwriteImports(importObject) {
+        importObject.env = {
+          ...importObject.env,
+          ...importObject.napi,
+          ...importObject.emnapi,
+          memory: wasmMemory,
+        }
+      },
+    })
+  },
+})
+
+globalThis.onmessage = function (e) {
+  handler.handle(e)
+}