Add icon links to header

[RemDelaporteMathurin]

Hi all,

Thanks for this very good theme!

I would like to add a link to our discourse page next to the repository, download, full screen and dark mode buttons.

Unfortunately, I've only been able to add it to the sidebar following the documentation.

Is there anyway to move this icon link there?

Thanks!

My conf.py html_theme_options

html_theme_options = {
    "repository_url": "https://github.com/festim-dev/FESTIM",
    "use_repository_button": True,
    "use_edit_page_button": True,
    "repository_branch": "main",
    "path_to_docs": "./docs/source",
    "icon_links": [
        {
            "name": "Community Forum",
            "url": "https://festim.discourse.group/",
            "icon": "fa-brands fa-discourse",
        },
    ],
}