Add SR2024 Venue Maps to the Competition event page

These are extracted from the CI build of the floorplans repo:
- srobo/comp-floorplans@3aa3386
- https://github.com/srobo/comp-floorplans/actions/runs/8270121158/artifacts/1323558880

Files 'map-with-teams.{pdf,png}' renamed to 'venue-map.{pdf,png}'.

_events/sr2024/competition.md

@@ -70,6 +70,14 @@ We have a limited amount of free parking on site for competitors.
 
 ![parking information]({{ '/resources/sr2024/parking-map.png' | prepend: site.baseurl }})
 
+### Layout
+
+[![venue map][venue-map-image]][venue-map-image]
+
+You can also download a PDF of the [venue map][venue-map].
+
 [league-schedule]: https://studentrobotics.org/comp/schedule
 [knockouts-schedule]: https://studentrobotics.org/comp/knockout
 [soton-campus-directions]: https://www.southampton.ac.uk/student-life/campuses/highfield
+[venue-map-image]: {{ '/resources/sr2024/venue-map.png' | prepend: site.baseurl }}
+[venue-map]: {{ '/resources/sr2024/venue-map.pdf' | prepend: site.baseurl }}