docs: Added README.md file to support the new ESP-WebServer sketch

examples/ESP-WebServer/README.md

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+# 🌡️ Arduino Sketch: DS18B20 Sensor via Wi-Fi (REST Endpoints & Dashboard)
+
+This **example Sketch** demonstrates how to use the [Arduino Temperature Control Library](https://github.com/milesburton/Arduino-Temperature-Control-Library) on an **ESP8266** or **ESP32** to read temperature data from **Maxim (Dallas) DS18B20** sensors. The Sketch publishes the readings via Wi-Fi in two ways:
+
+1. **REST Endpoints** - Ideal for Node-RED, Home Assistant, or other automation platforms.
+2. **A Human-Friendly Dashboard** - A simple web interface, powered by [Chart.js](https://www.chartjs.org/) and [Tailwind CSS](https://tailwindcss.com/), displaying current and historical temperatures.
+
+---
+
+## 🔎 Features
+- Reads from one or more **DS18B20** temperature sensors
+- Configurable **polling interval** (in milliseconds) and **history length** (number of readings)
+- **Lightweight dashboard** that visualizes the last N readings
+- **REST endpoints** for easy integration:
+  - `/temperature` - current readings
+  - `/sensors` - sensor addresses
+  - `/history` - historical data
+
+---
+
+## 📚 Potential Use Cases
+- **Node-RED** automation flows: Perform regular HTTP GET requests against `/temperature` or `/history`
+- **Home Assistant** integrations: Use built-in REST sensors to track temperature over time
+- **Extensible to other sensor types** (humidity, light, pressure, etc.) by following the same approach
+
+---
+
+## 🛠️ Getting Started
+1. **Clone or download** this repository
+2. **Open the Sketch** (the `.ino` file) in the Arduino IDE (or other environment)
+3. **Install dependencies**:
+   - [Arduino Temperature Control Library](https://github.com/milesburton/Arduino-Temperature-Control-Library)
+   - ESP8266 or ESP32 core for Arduino
+4. **Set your Wi-Fi credentials** in the code:
+```cpp
+const char* ssid = "YourNetwork";
+const char* password = "YourPassword";
+```
+5. **Adjust** the interval and history:
+```cpp
+// Configuration
+const unsigned long READ_INTERVAL = 10000; // e.g. 10 seconds
+const int HISTORY_LENGTH = 360; // 1 hour at 10-second intervals
+```
+6. **Connect** the DS18B20 sensor(s) to the ESP, using OneWire with a pull-up resistor
+7. **Upload** the Sketch to your device
+8. **Check** the serial monitor for the IP
+9. **Navigate** to that IP in your browser to see the chart-based interface
+
+---
+
+## ❓ Questions & Support
+- **Library Matters**: If you have issues with the **Arduino Temperature Control Library** itself, please open a ticket in the [official repository](https://github.com/milesburton/Arduino-Temperature-Control-Library/issues)
+- **This Sketch**: For help customizing this example, dealing with Wi-Fi issues, or setting up the chart dashboard, and other device-specific tweaks, please visit the [Arduino Forum](https://forum.arduino.cc/). You will find many friendly developers there ready to help.
+
+---
+
+## 📜 License
+This project is distributed under the [MIT License](https://opensource.org/licenses/MIT).
+
+> We hope you find this Sketch useful for monitoring temperatures - both in a machine-readable (REST) and human-friendly (web dashboard) format. Happy hacking! 🚀