Chemical Science is now... Chemical

Requires barrelled Petroleum Gas instead of Engine Units to craft Chemical Science, it's called Chemical Science after all.

Optional settings in startup:
Change Petroleum Gas to Crude Oil
Return the empty barrel (off by default) - Makes barrels a logistical challenge but saves the steel usage
Alternative option to use direct fluid inputs, instead if barrelled fluids for an easier build.

This has been created with AI, but I am responsible for the prompting (I'm new to code so I am learning)