Add info on train schedules and displays its planned path on top of the map.

[D3rPole]

Added information window for each train

Window shows:

• Speed
• Current schedule (all stations)
• Which station is current target
• Expected arrival countdown for each station
• Current path of the train is overlaid on top of the track map when this window is open

Window opens when a train is clicked.

Little video to show how it looks like: https://github.com/jenchanws/create-track-map/assets/28690204/697b3e6a-f466-4961-b35b-70245f0d51d9

Used this to create the window: https://github.com/mapshakers/leaflet-control-window