fix: uncrafts for lightweight plastic containers

[chaosvolt]

Purpose of change

Realizing that I can't salvage gallon jugs has once again abruptly led me down a weird rabbit hole of screaming at salvage-by-weight.

Describe the solution

Since we've since decided to fudge the numbers for small underwear items and just let them be uncrafted into full rags, I added uncrafts for all plastic containers to convert them into a given number of plastic chunks (or scrap in the case of small bottles).

Describe alternatives you've considered

1. Going the full suffering route and bumping the weights for all plastic bottles to heavier values that will translate into a reasonable number of scraps.
2. Making it so plastic material salvages into plastic scrap instead and using that in recipes more.
3. Making plastic chunks smol.
4. Reverting Port over salvage-by-weight from DDA #2142 because jfc why does it constantly cause me so much suffering.
5. Lowering how many chunks containers require to craft to commit some faint semblance of conservation of mass.

Testing

1. Checked affected file for syntax and lint errors.
2. Ported file change over to test build, confirmed I can now take a gallon jug apart for 12 plastic chunks.

Additional context

I loaded up DDA (old build, 2023-12-16-1905) and looked at gallon jugs, they went with the "beef the weight up" solution. However, it only returns 2 chunks when salvaged but still demands 15 chunks PLUS a polycarbonate sheet, so it's just wasteful to a wacky degree.

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