Berry 'tasmota.int(v, min, max)' function

[s-hadinger]

Description:

Berry add tasmota.int(v, min, max) to convert a value v to an int and to guard the value between min and max. If v is nil, it returns min. If min > max, it returns min. If min or max are nil, it behaves like Berry native int().

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.0.241206
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass