Split compilation instructions from README.md (#13457)

doc/compiling/windows.md

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+# Compiling on Windows using MSVC
+
+## Requirements
+
+- [Visual Studio 2015 or newer](https://visualstudio.microsoft.com)
+- [CMake](https://cmake.org/download/)
+- [vcpkg](https://github.com/Microsoft/vcpkg)
+- [Git](https://git-scm.com/downloads)
+
+
+## Compiling and installing the dependencies
+
+It is highly recommended to use vcpkg as package manager.
+
+After you successfully built vcpkg you can easily install the required libraries:
+```powershell
+vcpkg install zlib zstd curl[winssl] openal-soft libvorbis libogg libjpeg-turbo sqlite3 freetype luajit gmp jsoncpp opengl-registry --triplet x64-windows
+```
+
+- **Don't forget about IrrlichtMt.** The easiest way is to clone it to `lib/irrlichtmt` as described in the Linux section.
+- `curl` is optional, but required to read the serverlist, `curl[winssl]` is required to use the content store.
+- `openal-soft`, `libvorbis` and `libogg` are optional, but required to use sound.
+- `luajit` is optional, it replaces the integrated Lua interpreter with a faster just-in-time interpreter.
+- `gmp` and `jsoncpp` are optional, otherwise the bundled versions will be compiled
+
+There are other optional libraries, but they are not tested if they can build and link correctly.
+
+Use `--triplet` to specify the target triplet, e.g. `x64-windows` or `x86-windows`.
+
+
+## Compile Minetest
+
+### a) Using the vcpkg toolchain and CMake GUI
+
+1. Start up the CMake GUI
+2. Select **Browse Source...** and select DIR/minetest
+3. Select **Browse Build...** and select DIR/minetest-build
+4. Select **Configure**
+5. Choose the right visual Studio version and target platform. It has to match the version of the installed dependencies
+6. Choose **Specify toolchain file for cross-compiling**
+7. Click **Next**
+8. Select the vcpkg toolchain file e.g. `D:/vcpkg/scripts/buildsystems/vcpkg.cmake`
+9. Click Finish
+10. Wait until cmake have generated the cash file
+11. If there are any errors, solve them and hit **Configure**
+12. Click **Generate**
+13. Click **Open Project**
+14. Compile Minetest inside Visual studio.
+
+### b) Using the vcpkg toolchain and the commandline
+
+Run the following script in PowerShell:
+
+```powershell
+cmake . -G"Visual Studio 15 2017 Win64" -DCMAKE_TOOLCHAIN_FILE=D:/vcpkg/scripts/buildsystems/vcpkg.cmake -DCMAKE_BUILD_TYPE=Release -DENABLE_GETTEXT=OFF -DENABLE_CURSES=OFF
+cmake --build . --config Release
+```
+Make sure that the right compiler is selected and the path to the vcpkg toolchain is correct.
+
+
+## Windows Installer using WiX Toolset
+
+Requirements:
+* [Visual Studio 2017](https://visualstudio.microsoft.com/)
+* [WiX Toolset](https://wixtoolset.org/)
+
+In the Visual Studio 2017 Installer select **Optional Features -> WiX Toolset**.
+
+Build the binaries as described above, but make sure you unselect `RUN_IN_PLACE`.
+
+Open the generated project file with Visual Studio. Right-click **Package** and choose **Generate**.
+It may take some minutes to generate the installer.