Subject: [bug#60521] [PATCH] home: Add home-stow-migration-service.

From: Feng Shu <[email-masked]>
Date: Thu, 09 Nov 2023 08:59:40 +0800

Hello, What about add template feature to home-dotfiles-service-type.
for example, if I have a stow file like below.

.Xresources
```
xft.dpi: $MYDPI
```

I can config home-dotfiles-service-type to replace $MYDPI to a value.

maybe we can add a converter argument and let user define a converter
function to handle all text file before local-file.

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