adding ORCID icon to authors

[haflex]

adds the possibility to show and ORCID.org icon with link to profile behind the author name.

If an orcid attribute is found in a author description the orcid icon will appear behind the author name.
The icon is a link that points to https://orcid.org/<author-id>

example:

(
    name: "Mattis Hasler",
    orcid: "0000-0001-7979-674X"
)

will point to: https://orcid.org/0000-0001-7979-674X

[haflex]

I just saw that there is a issue asking for this: #75

[saecki]

Thanks for the PR! Although maybe not super successful at it, the goal of this repository is to have idiomatic examples of how Typst templates should look like, both code-wise and visually, not necessarily to be feature complete. Currently the only external package used in the template repository is cetz, and that is used quite extensively in the badformer package. Adding a dependency for a single icon seems a bit much.