Have settings file with extension methods

Allow user-defined extension method like templates so can saying things like `x is positive` where `x` is a BigDecimal and have it convert into code such `x.signum() > 0`

Essentially, create an additional method "isPositve" which inlines the logic. This way, can use existing speech to code functionality. For example `x is empty` will invoke `x.isEmpty()` for String and Collection since there's a method named isEmpty. Whereas, if `x` is a StringBuilder, there is no isEmpty method. However, an extension method could be defined so that the code becomes `x.length() == 0`

I could define some predefined extension methods and the user can add their own.

The issue names no files, tests, or entry points. Start by locating the existing template-based speech-to-code expansion and configuration handling, then determine how predefined and user-defined extension methods should be represented. Done means a settings mechanism supports examples such as `is positive` and `is empty`, including custom logic for types without the corresponding method.

Written by the indexing model from the issue text.