Method to read from path like routes to normal path about node-json-db

[alexsad]

pr #688

[alexsad]

The main idea is to simplify access to an object's path using the route style by always searching for the "id" property of objects within a list.
eg.

{
objects: [ 
{
   id:'4xs4s4',  
    list: [ 
      {id: '1' , desc: 'ssss', itens:[]},
      {id: '2' , desc: 'ssss', itens: []},
      {id: '3' , desc: 'ssss', itens:[
        {id:'21x6', name:'sss',
      ] },
    ]  
 }
 },
 { .... },
}

can be access by eg.

const path= await db.toPath('/objects/4xs4s4/list/3/itens/21x6')
db.delete(path)

I don't know if I knew how to explain it well, but every time I need to get the path of an item more deeply I have to use getIndex more and more.
So with this method I can simplify searches for deletion and update.
Just an observation, I'm terrible at naming methods and variables, so feel free to modify if you're going to accept the PR.

[Belphemur]

Fixed by #688