feat(example): add Classic Bluetooth PAN profile examples

docs/en/api-reference/bluetooth/classic_bt.rst

@@ -13,6 +13,7 @@ The Bluetooth Classic API provides the following main features:
 - Media playback control (**AVRCP**)
 - Hands-free calling support (**HFP**)
 - Input device connectivity (**HID** host and device roles)
+- Personal Area Networking (**PAN**)
 
 ----
 
@@ -59,6 +60,10 @@ The Bluetooth Classic API in ESP-IDF is organized into the following parts:
 - :doc:`Bluetooth HID Device <esp_hidd>`: Implements peripheral roles such as keyboard, mouse, or game controller
 - :doc:`Bluetooth HID Host <esp_hidh>`: Implements the host role for connecting to remote HID devices
 
+**Personal Area Networking (PAN)**
+
+- :doc:`Bluetooth PAN <esp_pan>`: BNEP-based networking with PANU, NAP, and GN roles
+
 Each part typically includes an **Overview**, **Application Examples**, and **API Reference**, covering purpose, main functionality, sample usage, and detailed API documentation.
 
 
@@ -77,3 +82,4 @@ Each part typically includes an **Overview**, **Application Examples**, and **AP
    Bluetooth HFP AG <esp_hf_ag>
    Bluetooth HID Device <esp_hidd>
    Bluetooth HID Host <esp_hidh>
+   Bluetooth PAN <esp_pan>

docs/en/api-reference/bluetooth/esp_pan.rst

@@ -0,0 +1,23 @@
+Bluetooth® PAN API
+==================
+
+:link_to_translation:`zh_CN:[中文]`
+
+Overview
+--------
+
+PAN (Personal Area Networking) enables IP networking over Classic Bluetooth using BNEP (Bluetooth Network Encapsulation Protocol). Devices can act as a PAN User (PANU), Group Network (GN) hub, or Network Access Point (NAP) so peers can exchange Ethernet frames and obtain network access.
+
+Application Examples
+--------------------
+
+- :example:`bluetooth/bluedroid/classic_bt/bt_pan_nap` demonstrates how to use the PAN Network Access Point (NAP) role so that PANU peers can reach the Internet through the ESP device's Wi-Fi STA uplink.
+
+- :example:`bluetooth/bluedroid/classic_bt/bt_pan_panu` demonstrates how to use the PAN User (PANU) role to connect to a NAP (for example ``bt_pan_nap`` or a phone with Bluetooth tethering) and verify IP connectivity.
+
+- :example:`bluetooth/bluedroid/classic_bt/bt_pan_gn` demonstrates how to use the PAN Group Network (GN) role as a hub that bridges multiple PANU clients so they can communicate on the same subnet.
+
+API Reference
+-------------
+
+.. include-build-file:: inc/esp_pan_api.inc