Category/Theme tags are updated on work pages

[r-ferrier]

Description

Update the tags section on a work page to move it further down the page and add in a subtitle.

design file here

Acceptance criteria

• [ ] Tags appear under the main content of a work page
• [ ] Tags have a subtitle appended to them - See more

[kimadactyl]

Supercedes https://github.com/geeksforsocialchange/gfsc-v3/issues/334