Add clay canning pot

[AtomicFox556]

Summary

Content "Add clay canning pot"

Purpose of change

Add a replacement for the metal canning pot in case metal and/or welding tools aren't available for making one.

Describe the solution

Add a clay variant of a canning pot, serving as a substitution for a regular canning pot in all recipes.

Describe alternatives you've considered

None.

Testing

Launched the game, looked at clay canning pot recipe and item information to verify that everything's fine.

Additional context

Taken from MST Extra mod with some changes.

[PatrikLundell]

A clay pot should be a lot heavier than a metal one, given that it will have to be really thick to carry all that weight. I'm not even sure you can make one that has a flat bottom that is capable of carrying that weight without the bottom falling out of it if you try to lift it.

[Alex-Folts]

I know nothing about pottery, but i saw pots which large enough to fit person inside, people make them somehow so i dont think it would inevitably collapse on its own weight.

That said, 27cm longest side seems too small, simple calculation of cylinder show that for 25L of inner volume you need at least cylinder with dimensions d=32cm h=32cm, not counting wall thickness. And pots have tricky shape so it would be even larger, 35+ cm. As for mass of the pot itself, assuming 1cm avg wall thickness, should be at least 15+ kg.

[AtomicFox556]

A clay pot should be a lot heavier than a metal one, given that it will have to be really thick to carry all that weight. I'm not even sure you can make one that has a flat bottom that is capable of carrying that weight without the bottom falling out of it if you try to lift it.

I know nothing about pottery, but i saw pots which large enough to fit person inside, people make them somehow so i dont think it would inevitably collapse on its own weight.

That said, 27cm longest side seems too small, simple calculation of cylinder show that for 25L of inner volume you need at least cylinder with dimensions d=32cm h=32cm, not counting wall thickness. And pots have tricky shape so it would be even larger, 35+ cm. As for mass of the pot itself, assuming 1cm avg wall thickness, should be at least 15+ kg.

In this case all clay vessels are be in need of such a weight audit. In game there is a larger clay pot with a capacity of 37.5 L and weighing 4887 g, so a smaller but about three times as heavier pot is quite an outlier.

My calculations show that it'd be lighter though; assuming a density of 2000 kg/m^3 (the average for baked solid clay bricks; the only reference I could find regarding fired clay density), an outer cylinder with d=34 cm and h=33 cm (resulting volume 29.96 L) and an empty inner cylinder with d=32 cm and h=32 cm (resulting volume 25.74 L), we get a clay pot with 1 cm thick walls and bottom with weight of 8.44 kg, still notably heavier than the existing larger pots.

Found references on clay pot thickness suggest that 1 cm wall thickness is about right: 1/3 to 1/4 of an inch is the recommended pottery thickness for a beginner; thinner pots are harder to work with, and pots that are much thicker (more than half an inch) would need to dry for some time before being fired so that they wouldn't explode when fired.

I'll set the weight and other stats to assume those parameters.