Dew point, frost point calculations component

**Describe the problem you have/What new integration you would like**

Dew point frost point calculations component needed (using pressure and relative humidity, or more accurate formulas see link)

https://en.wikipedia.org/wiki/Dew_point

**Please describe your use case for this integration and alternatives you've tried:**

**Additional context**

Start by reviewing the linked Wikipedia dew-point reference and the discussion in this feature request to determine which pressure, humidity, dew-point, and frost-point formulas are expected. Define the component's scope and completion criteria before locating the corresponding ESPHome component conventions; the issue names no files or tests to run.

Written by the indexing model from the issue text.