Stable explosives infrastructure

[Brian-Otten]

Summary

SUMMARY: Infrastructure "Adds stable_explosive requirement and fixes some recipes"

Purpose of change

Explosives crafting still needed more infrastructure to let people add more recipes later in a scalable way. this adds the stable_explosives requirement for explosives that don't detonate easily, with them being 10g tnt equivalent each again.

I also discovered use of ammonium nitrate was a mess because of weird unit sizes, i standardized to 1g in this case for ease of use in explosive recipes specifically, since that will be the main usecase of the item.

Describe the solution

Adds stable_explosive requirement with suitable ingredients.
Add HMTD to volatile_explosive requirement. (overlooked possibility in last PR)
Standardize ammonium nitrate to 1g units and adjust all relevant recipes.
Standardize ANFO to 1g units and adjust relevant recipes.
Add ammonium nitrate pellets.
Allow converting of commercial fertilizer into ammonium nitrate pellets ( using the fertilizer directly would require changing fertilization code )
Allow grinding of ammonium nitrate pellets into powder.
Convert the fertilizer bomb to use new stable_explosive standard.

Describe alternatives you've considered

Rework use of fertilizer to allow use of commercial fertilizer in 1g portions in recipes directly (probably outside my skillset)

Testing

Game loads and all recipes work.

[Brian-Otten]

Gave this a quick once over since 0.E and i don't see any issues right now, so should still be good to merge.