move compute to the main thread for browser and node

- now, most of the work is happening on the main thread
- for database in browser, we still have dedicated WebWorker - but it is used only for OPFS access and only for that
- for syn in browser we still offload sync operations to the WebWorker

bindings/javascript/packages/common/compat.ts

@@ -192,7 +192,12 @@ class Database {
     }
 
     try {
-      this.db.batchSync(sql);
+      let stmt = this.prepare(sql);
+      try {
+        stmt.run();
+      } finally {
+        stmt.close();
+      }
     } catch (err) {
       throw convertError(err);
     }
@@ -408,6 +413,10 @@ class Statement {
       throw convertError(err);
     }
   }
+
+  close() {
+    this.stmt.finalize();
+  }
 }
 
 export { Database, Statement }