Add plain javascript example with async call

Author: gionatamettifogo

examples/with-plain-javascript/README.md

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+## Getting Started
+
+This example shows how to use @sqlitecloud/drivers in plain Javascript
+
+To run the example:
+
+```bash
+npm install
+npm run start
+```

examples/with-plain-javascript/app.js

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+//
+// Using @sqlitecloud/drivers with plain Javascript
+//
+
+var sqlitecloud = require('@sqlitecloud/drivers')
+
+require('dotenv').config()
+var DATABASE_URL = process.env.DATABASE_URL
+console.assert(DATABASE_URL, 'DATABASE_URL environment variable not set in .env')
+
+async function selectTracks() {
+  // create a connection with sqlitecloud
+  var database = new sqlitecloud.Database(DATABASE_URL)
+
+  // run async query
+  var tracks = await database.sql`USE DATABASE chinook.sqlite; SELECT * FROM tracks LIMIT 20;`
+  console.log(`getTracks returned:`, tracks)
+
+  // You can also use all the regular sqlite3 api with callbacks, see:
+  // https://docs.sqlitecloud.io/docs/sdk/js/intro
+}
+
+void selectTracks()

examples/with-plain-javascript/package-lock.json

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+{
+  "name": "with-javascript-express",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./app.js"
+  },
+  "dependencies": {
+    "@sqlitecloud/drivers": "^0.0.56",
+    "debug": "^4.3.4",
+    "dotenv": "^16.4.5"
+  }
+}