[Helpers] Add option to simplify convert/link value <--> value in Lovelace helper configuration panel

Suggestion: Add True table to the Helpers section to convert/link values.
Maybe with two options: Convert or Link (to another helper)

Why: for simplifying values convert/link to corresponding values/helper.

Example:
bool <–> text: 0 = off, 1 = on
value <–> text: 0 = manual/forced off, 1 = manual/forced on, 2 = auto off, 3 = auto on, etc.
Select text --> value: selecting a option by the select-helper to convert/link the selected text to a value, written to a 2nd variable (helper).