Add new section about using ESP-IDF with PlatformIO

This adds a description of PlatformIO ecosystem, tutorials, examples

Merges https://github.com/espressif/esp-idf/pull/5132

docs/en/resources.rst

@@ -3,6 +3,16 @@ Resources
 *********
 :link_to_translation:`zh_CN:[中文]`
 
+.. toctree::
+    :caption: Third-Party Tools
+    :maxdepth: 2
+
+    third-party-tools/platformio
+
+
+Useful Links
+############
+
 * The `esp32.com forum <https://esp32.com/>`_ is a place to ask questions and find community resources.
 
 * Check the `Issues <https://github.com/espressif/esp-idf/issues>`_  section on GitHub if you find a bug or have a feature request. Please check existing `Issues <https://github.com/espressif/esp-idf/issues>`_ before opening a new one.

docs/en/third-party-tools/platformio.rst

@@ -0,0 +1,60 @@
+.. _platformio:
+
+PlatformIO
+##########
+
+.. image:: ../../_static/platformio-logo.png
+  :target: https://platformio.org/?utm_source=docs.espressif.com
+
+.. contents::
+    :local:
+
+What is PlatformIO?
+~~~~~~~~~~~~~~~~~~~
+
+`PlatformIO <https://platformio.org/?utm_source=docs.espressif.com>`__
+is a cross-platform embedded development environment with out-of-the-box support
+for ESP-IDF.
+
+Since ESP-IDF support within PlatformIO is not maintained by the Espressif team,
+please report any issues with PlatformIO directly to its developers in
+`the official PlatformIO repositories <https://github.com/platformio>`_.
+
+A detailed overview of the PlatformIO ecosystem and its philosophy can be
+found in `the official PlatformIO documentation <https://docs.platformio.org/en/latest/what-is-platformio.html?utm_source=docs.espressif.com>`_.
+
+Installation
+~~~~~~~~~~~~
+
+* `PlatformIO IDE <https://platformio.org/platformio-ide?utm_source=docs.espressif.com>`_
+  is a toolset for embedded C/C++ development available on Windows, macOS and Linux
+  platforms
+* `PlatformIO Core (CLI) <https://docs.platformio.org/en/latest/core/index.html?utm_source=docs.espressif.com>`_
+  is a command-line tool that consists of multi-platform build system, platform and
+  library managers and other integration components. It can be used with a variety of
+  code development environments and allows integration with cloud platforms and web
+  services
+
+Configuration
+~~~~~~~~~~~~~
+
+Please go through `the official PlatformIO configuration guide for ESP-IDF <https://docs.platformio.org/en/latest/frameworks/espidf.html?utm_source=docs.espressif.com#configuration>`_.
+
+Tutorials
+~~~~~~~~~
+
+- `ESP-IDF and ESP32-DevKitC: debugging, unit testing, project analysis
+  <https://docs.platformio.org/en/latest/tutorials/espressif32/espidf_debugging_unit_testing_inspect.html?utm_source=docs.espressif.com>`__
+
+Project Examples
+~~~~~~~~~~~~~~~~
+
+Please check ESP-IDF page in `the official PlatformIO documentation <https://docs.platformio.org/en/latest/frameworks/espidf.html?utm_source=docs.espressif.com#examples>`__
+
+Next Steps
+~~~~~~~~~~
+
+Here are some useful links for exploring the PlatformIO ecosystem:
+
+- Learn more about `integrations with other IDEs/Text Editors <https://docs.platformio.org/en/latest/integration/ide/index.html?utm_source=docs.espressif.com>`_
+- Get help from `PlatformIO community <https://community.platformio.org/?utm_source=docs.espressif.com>`_

docs/zh_CN/resources.rst

@@ -3,6 +3,16 @@
 ****
 :link_to_translation:`en:[English]`
 
+.. toctree::
+    :caption: 第三方工具
+    :maxdepth: 2
+
+    third-party-tools/platformio
+
+
+有用的链接
+##########
+
 * 您可以在 `ESP32 论坛 <https://esp32.com/>`_ 中提出您的问题，访问社区资源。
 
 * 您可以通过 GitHub 的 `Issues <https://github.com/espressif/esp-idf/issues>`_  版块提交 bug 或功能请求。在提交新 Issue 之前，请先查看现有的 `Issues <https://github.com/espressif/esp-idf/issues>`_。

docs/zh_CN/third-party-tools/platformio.rst

@@ -0,0 +1 @@
+.. include:: ../../en/third-party-tools/platformio.rst