add Maybe monad, mcompose, and makeSafe

The goal is to provide a way to safely compose functions without having to worry about any one of the failing.
```
// makeSafe :: fn -> * -> Maybe
makeSafe = (fn) => curryN(fn.length, (...args) => Maybe.of(fn(...args)));
```

Start by locating the public entry point for the JavaScript utilities and the existing composition conventions. Use the issue's Maybe, mcompose, and makeSafe names as the scope, then verify safe composition and failure-handling behavior before considering the feature complete.

Written by the indexing model from the issue text.