feature: extending Scheduler with functions

[proddy]

Discussed in https://github.com/emsesp/EMS-ESP32/discussions/2111

^{Originally posted by SoftVienka October 19, 2024} Hello Is it possible to use the round() function in the scheduler?

Write entity RAM float (17.25) to entity RAM as int (17)

example: Command: custom/interval Value: (x > 2 && x < 10) ? custom/interval_1 : custom/interval

interval_1 is a float and I want it to be stored as an int into interval

when I write round(custom/interval1) then npr: round17.25 is written into the interval

[proddy]

Michael added the functions int, round, abs, log, exp, sqrt and pow in 3.7.0-dev.48