[RFC]: add support for computing the error function for single-precision floating-point numbers

[kgryte]

Description

This RFC proposes adding support for computing the error function for single-precision floating-point numbers.

The package is the single-precision analogue to @stdlib/math/base/special/erf. Similar to that package, we can base our implementation on msun. The implementations for both JavaScript and C should follow the reference implementation.

For the JavaScript implementation, we'll need to make sure that we emulate float32 arithmetic by wrapping operation results with float64ToFloat32. This will mean noticeable performance degradation in JavaScript, but will ensure that the JavaScript and C implementations produce the same results.

Package: @stdlib/math/base/special/erff
Alias: erff

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• The issue name begins with RFC:.