feat: add initial non-finite support (#16)

* feat: add initial non-finite support

* wip

* test: to_string

* test: power

* test: power

* test: parse

* test: from_polar

* wip

* fix: parse pure imaginary non finite

* phase

* test: add and subtract

* test: multiply

* feat: erf family

* test: make tests pass

* test: real, imag ,conj

* feat: sqrt

* feat: exp

* feat: ln, log2, log10, atan2

* test: windows

* format

* fix

Author: polvalente