KLI Command Searcher

Accepts an array of commands with a name and aliases, then returns a searcher
that can be used to autcomplete and detect which command was intended.

``js
it('ensure searching for all aliases and names are the same', assert => {
const subject = searcher({
commands: [
{
name: 'command',
aliases: ['test', 'another'],
},
],
})
const name = subject.get('comm')[0]
const alias1 = subject.get('test')[0]
const alias2 = subject.get('anot')[0]
assert.ok(name === alias1 && alias1 === alias2 && alias2 === name)
})
``