Implement 516 values_ procs

[ike709]

#2203

Implements:

• values_dot() - https://www.byond.com/docs/ref/#/proc/values_dot
• values_product() - https://www.byond.com/docs/ref/#/proc/values_product
• values_sum() - https://www.byond.com/docs/ref/#/proc/values_sum
• values_cut_under() - https://www.byond.com/docs/ref/#/proc/values_cut_under
• values_cut_over() - https://www.byond.com/docs/ref/#/proc/values_cut_over