Add box-selection mode for selecting multiple vertices at once

Nobody has claimed this yet.

**mapbox-gl-js version**: newest
**mapbox-gl-draw version**: newest

### Steps to Trigger Behavior

-

### Expected Behavior

I would like to select verticles programatically.
Currently I can't see the possibility of selecting only a couple of verticles of a polygon.

I'd like to add a function when I hold a key + click + drag draw a bounding box which selects the verticles of the selected feature within the bounding box.

Draw a bbox and select features example:
https://docs.mapbox.com/mapbox-gl-js/example/using-box-queryrenderedfeatures/

I want the same but selecting the vertex of the currently selected feature instead the whole feature's each vertex.

### Actual Behavior

Currently, If I want to select multiple vertexes I have to zoom in, hold the shift key and click vertexes one-by-one which is very slow and frustrating, especially when I'm working with a bigger geojson file (5MB).

Why I need it? Sometimes there are many unneccessary points within a polygon that I want to remove.

No implementation files or tests are named. Start by reviewing the existing vertex-selection interaction and the linked Mapbox box-query-rendered-features example; done means a key-plus-drag bounding box selects only vertices within the currently selected feature.

Written by the indexing model from the issue text.