Container audit (mostly transparency)

[Brambor]

Summary

Balance "Make most plastic and glass containers transparent"

Purpose of change

Working on #73400 revealed that containers are not transparent (apart from two exceptions). The most notable non-transparent containers are a plastic bag and a plastic bottle.

Some containers didn't make sense.

• tankard_wooden wasn't an open container, so you could transport coffee in it in your bag
  • 
• camelbak, which is a hydration pack was rigid
  • 

Describe the solution

I went through all containers in items/containers/containers.json and added "transparent": true where it made sense. If it had a URL in "//", I looked at that, if not, I often googled it. If at least half of the pictures were transparent, I made it transparent - my rationale is a benefit of the doubt, the non-transparent container will be more annoying to work with in the future, I think.

• Made tankard_wooden "open_container": true.
• Removed "rigid": true from camelbak.

Describe alternatives you've considered

Testing

TODO: Rebased #73400 onto this and enjoyed that I can see inside the containers (meaning they don't indicate hides content, which means they are transparent.)

1. Merge with / rebase onto Show NEW! in List Items menu #73400.
2. Spawn all items inside containers.
3. View Item List.
4. Sort it by category.
5. Scroll to the food category.
6. Go over all items, so they are not NEW!.
7. Observe if "hides contents" make sense.
   • It does.
     • Things like paper wrapper and tin can (sealed) still hide contents
     • While plastic bottle, glass bottle, and plastic bag don't hide contents.
   • 

Additional context

• bag_plastic_small is watertight, so you can put water in it, put it on the ground or in a bag and it won't spill
  • 

I didn't believe the bag would hold liquid, so I took one IRL, filled it with water and it didn't leak! Marvellous!