Docs: Add migration guide for Windows environment (Msys/Mingw was removed)

docs/en/migration-guides/index.rst

@@ -5,6 +5,7 @@ ESP-IDF 5.0 Migration Guides
 .. toctree::
     :maxdepth: 1
 
+    Environment Setup on Windows <windows-env>
     Peripherals <peripherals>
     Build System <build-system>
     System <system>

docs/en/migration-guides/windows-env.rst

@@ -0,0 +1,4 @@
+Migrate Windows Environment to ESP-IDF 5.0
+==========================================
+
+The Msys/Mingw-based Windows environment support got deprecated in ESP-IDF v4.0 and was entirely removed in v5.0. Please use :ref:`get-started-windows-tools-installer` to set up a compatible environment. The options include Windows Command Line, Power Shell and the graphical user interface based on Eclipse IDE. In addition, a VS Code-based environment can be set up with the supported plugin: https://github.com/espressif/vscode-esp-idf-extension.

docs/zh_CN/migration-guides/index.rst

@@ -5,6 +5,7 @@ ESP-IDF 5.0 迁移指南
 .. toctree::
     :maxdepth: 1
 
+    Environment Setup on Windows <windows-env>
     外设 <peripherals>
     构建系统 <build-system>
     系统 <system>

docs/zh_CN/migration-guides/windows-env.rst

@@ -0,0 +1 @@
+.. include:: ../../en/migration-guides/windows-env.rst