Add new more generic version of close in Expect

[rahicks26]

Currently, there is easy to check if two floats are close to each other, but it would be nice to add some new methods that extend this method and maybe a few other float specific to work with more types such as decimal and UoMs.

/// Rough v1.  Need to look at the other methods to make it compatible.
let inline close v1 v2 epsilon =
    let diff = (v1 - v2)
    let delta = abs diff
    delta < epsilon

[rahicks26]

Would love to do a PR for something like this if it would be helpful.

[haf]

@rahicks26 Yes it would be helpful. :)

[rahicks26]

Awesome I did a bit of a POC Friday. Should have a PR up around the end of this week.