Support non-scaling conversions. #1
Description
Right now, we only support scaling conversions -- eg 1 meter is 100 centimeters.
We do NOT support other factors, like an interceptor -- Celsius to Farenheit is the obvious case
Describe the solution you'd like
Ideally we need to support an interceptor, or even more complicated examples that just use a function provided to modify the value.
The key scenario to support are the build-in conversions exposed from convert-types -- they already have all the logic to convert
all these methods, so we need to see how we can leverage those directly.