Add dpiScale to WindowInfo object

[lmachens]

Calling overwolf.windows.getCurrentWindow returns dpiScale which is updated based on current scaling.

Example:

{
  "window": {
    "id": "Window_Extension_lbkdbgdijedpnmifplbkcjgbioaklmpghbehfmnp_desktop",
    "name": "desktop",
    "width": 400,
    "height": 660,
    "top": 200,
    "left": 3040,
    "isVisible": true,
    "logicalBounds": {
      "top": 200,
      "left": 3040,
      "width": 400,
      "height": 660
    },
    "state": "Normal",
    "dpiScale": 1,
    "stateEx": "normal",
    "monitorId": "\\\\.\\DISPLAY1",
    "type": "Desktop"
  },
  "status": "success",
  "success": true
}

Related to overwolf/types#62

[OdedItkinOW]

Will be merged in one of the upcoming small api-docs cleanups. Mainly because it needs a bit of editing (It's mostly just that the dpi scale only actually changes if the window is defined as native. You can see this by comparing its behavior between the settings app's main window (non-native), and the overwolf app store's main window (native))