Add drawing markers to custom pane

[ma7moudat]

Skipped the issue template, since this is more of a feature request 🙏

This is similar to #360, but in my case I want the markers that are generated while drawing, which are created in the following lines (as far as I could see):

Leaflet.draw/src/draw/handler/Draw.Polyline.js

Line 88 in d5dd117

this._mouseMarker = L.marker(this._map.getCenter(), {

Leaflet.draw/src/draw/handler/Draw.Polyline.js

Line 355 in d5dd117

potentialMarker = new L.Marker(potentialLatLng, {

Leaflet.draw/src/draw/handler/Draw.Polyline.js

Line 381 in d5dd117

var marker = new L.Marker(latlng, {

I want these to be created in a custom pane instead of the marker-pane. The same also applies for the drawing guides and the handling of mouse events.

I'm aware that, in this case, some map elements might have a higher z-index and block the drawing process. This is a desired effect.

Is this possible to implement?