Blog: Show post categories in UI

[kgodey]

See #43 for context. This should be worked on after #49 since that PR adds categories.

Post categories are currently not being displayed in the UI, they should be displayed on the post page. The design is up to you.

[makkoncept]

hi @kgodey, I would like to work on this. Can you assign it to me?

[kgodey]

Go ahead!