feat(automation): Be able to evaluate math in automations with variables

[cy1der]

I recently got into a new tracker and I went to set up my usual pair of automations to abide by the hit & run rules (below), but this tracker's minimum seeding time is unlike others, the minimum seeding time is proportionate to the size where it starts at 3 days and an extra 5 hours per GB over 10GB with a max of 3 weeks. This got me thinking, it would be cool if automations could be a little "smarter".

Imagine instead of a safe-ish hard-coded 2 weeks in the automation, I can write something like ceil(min(259200 + (18000 * ((max(size, 10737418240) - 10737418240) / 1073741824)), 1814400)) (the units of all the numbers from left to right for clarity: seconds, seconds, bytes, bytes, bytes, seconds) and then I can come up with some other formula for share limits afterwards. This can drastically improve automations for unique setups.

minSeedTime.json
shareLimits.json