Create `taxonomy_list.html` for new taxonomies and enable feeds.

[stockholmux]

Is your feature request related to a problem? Please describe.

#488 added taxonomies to blog posts but uses a drop down selector to filter entires only and limits linking of specific types of context.

Describe the solution you'd like

We should create taxonomy_list.html which will make real pages for each category that are linkable.

Describe alternatives you've considered

n/a

Additional context

n/a