switch to fontawesome 6 as package

[rmnldwg]

I just found out that fontawesome has a pip package that can be used with django. However, there seems to be an issue with fontawesome 5 and pip. But I should probably sooner or later upgrade to fontawsome 6 anyways, so when that day has come, I can probably switch to the pip version.

[rmnldwg]

Looking at the new fontawesome package, I find the icons to be way less consistent and they don't really fit anymore. So I think I won't upgrade.