Respect IEEE specification for equation references

[avonmoll]

• IEEE equation references in the text should appear, for example, as "(1)" instead of "Equation 1".
• The example in the Typst documentation shows how to force the reference to use the same numbering as the equation
• However, that example did not include the link to the equation's label

[laurmaedje]

I reverted the font argument because it's not really DRY to have a font argument on the template. There could be many other arguments like this for other stuff. Right now, it's hard to override from the outside (future styling system improvements might change that), but since the template is always cloned into a new project at the moment, it's trivial to change in the template files itself for now. I also want to keep things consistent across the templates.

[laurmaedje]

Thanks!

[avonmoll]

Understood. Thanks for merging and for all the work on typst, in general - it's fantastic!