Adding a plugin that set the required environment variable to VcXsrv

plugins/vcxsrv/README.md

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+# VcXsrv plugin
+
+This plugin add the environment variables to allow graphic apps running on WSL
+to find the VcXsrv instance intalled on Windows. It assumes that you have let 
+the VcXsrv configured with your local machine.
+
+To use it, add `vcxsrv` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... vcxsrv)
+```
+
+## Requirements
+
+In order to make this work, you will need to have the folowing softwares 
+installed:
+* [WSL2](https://docs.microsoft.com/en-us/windows/wsl/);
+* [VxXsrv](https://sourceforge.net/projects/vcxsrv/).
+
+ VcXsrv installed on Windows.
+
+More info on the usage and install: https://github.com/direnv/direnv

plugins/vcxsrv/vcxsrv.plugin.zsh

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+export DISPLAY=$(awk '/nameserver / {print $2; exit}' /etc/resolv.conf 2>/dev/null):0 # in WSL 2
+export LIBGL_ALWAYS_INDIRECT=1