That experiment for short long-term evaluation whether or not external
link style is worth it or not is over. And I think it's too much
considering that the target audience is for personal blogs which will
not mind such things. Plus the amount of things to make it work properly
is just too much (i.e., the font has to have the glyph).
You would think this is something like this is already in the theme but
it turns out it isn't. This should fix pages that are primarily
non-content (i.e., about pages, contact).
The Hugo theme will also generate a counterpart system theme if there's
only one system theme given. Though, it isn't perfect so the release
will not happen for a while. I'll look into generating a color palette
with HSLuv to see if it can be improved.
I've also put more comments on the individual components in the partial.
Hopefully, that'll mitigate against me forgetting their purpose all over
again.
It should be easier to integrate it with other libraries such as Prism,
Mermaid, and D3 especially in the graphics department where it mostly
use vector graphics to do its thing.