Guix Typst project template

1. Modify ./guix/modules/template-package.scm (defines the project), ./channels.scm (for project dependencies), and ./manifest.scm (for development environment) to your requirements.

2. Install just by adding to your Guix Home configuration or running guix install just.

3. Run just update to update the dependencies.

4. Run just to generate the document. Run just run to generate then open the document. Run just dev to open a shell environment with the document's dependencies. Run just fonts to show the available fonts.