docs: add readme for how to run demo

Author: softbeehive

examples/README.md

@@ -0,0 +1,27 @@
+# Vue Stripe.js
+
+Full power of Stripe.js + beauty of Vue. Build advanced payment integrations quickly. Use examples for easy start with Payment, Card, and Express Checkout.
+
+## Demo 
+
+### 1. Clone
+```bash
+git clone git@github.com:ectoflow/vue-stripe-js.git
+```
+
+### 2. Install
+
+```bash
+npm install
+```
+
+### 3. Run demo
+```bash
+npm run dev
+```
+
+## Donate
+
+It's an open-source project and completely free to use. Keeping it up-to-date with the Stripe.js API is hard work. Consider supporting my efforts to make vue-stripe-js healthy and sustainable. Thank you!
+
+[**Become a sponsor** 💜](https://github.com/sponsors/softbeehive)