docs(common): Enhance documentation clarity in the examples directory

Author: suren-gabrielyan-espressif

examples/README.md

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+# Examples
+
+## Overview
+
+This directory showcases a variety of examples, illustrating the use of different interfaces and functionalities. Navigate through these examples to understand how to implement and integrate various components and features in your projects.
+
+## Detailed Examples
+
+1. **Multiple Network Interfaces Example**: Demonstrates the integration and management of multiple network interfaces.
+   Location: [multiple_netifs](esp_netif/multiple_netifs)
+
+2. **SLIP Device Client**: Provides a detailed example of a SLIP (Serial Line Internet Protocol) device client implementation.
+   Location: [slip_custom_netif](esp_netif/slip_custom_netif/)
+
+3. **MQTT Demo on Linux**: A comprehensive demonstration of an MQTT (Message Queuing Telemetry Transport) application designed to run on a Linux environment.
+   Location: [mqtt](mqtt)
+
+## Additional Resources and Examples
+
+For an extensive collection of additional examples, especially those related to specific components, please visit the upper layer directory and navigate to the respective component's example directory.
+
+**Important**: To explore more, check the path: `components/*component_name/examples`