feat: add option to format results

[mrsimpson]

Motivation

Some search providers, especially OSM, return the address search results in a not very common order.
E. g. the house number is returned in the first position of the label, which is very uncommon in German.

Changes done

This PR introduces a callback function which is executed in order to manipulate the search result label.

Caveats

As the query is currently not available in the result list, it could not be propagated to the callback function.
Adding this would have increased the PR which I wanted to avoid.

How it looks like

Before

Provider OSM

Afterwards

with callback injected

resultFormat: (result)=>{
          if(result.label.match(/^\d+,/)){
            // swap house no and street
            const components = result.label.split(',').map(s=>s.trim())
            const houseNo = components[0]
            components[0] = components[1]
            components[1] = houseNo
            return `${components.slice(0,2).join(' ')}, ${components.slice(2, components.length).join(',  ')}`
          }
          return result.label
          },

[mrsimpson]

@smeijer any chance to get this merged? I tried to keep the diff as small as possible.

[smeijer]

Thanks! Looking great.

[smeijer]

published as 3.2.0, thanks again! 🎉