Aftershock modern json

[snipercup]

Summary

SUMMARY: none

Purpose of change

Contributes to #36110

Describe the solution

• Change name to object
• Volume to string
• fix looks_like: It referred to an abstract item but that is pointless. I checked that no tileset has any sprite for the abstract it referred to and then changed it to the same bionic item id I used in Add looks like to positive bionic cbm items #35202
• Changed the 'mode' called 'default' from '1rd' to 'single' in afs_eidolon_derringer to be more in line with the vanilla guns. This is only visual.
• The file 5x50.json did have valid json but I added a [ in front and ] after the object definition to be more in line with the rest of the files.

Describe alternatives you've considered

Not changing

Testing

I was unable to spawn broken_chickenbot and I can't explain why