[Feature] Show lot category on the hotspots widget

[ItsSim]

In issue #62 the Hotspots widget was created, but the lot category isn't visible.

This feature would consist of a small indicator using an icon representative of the lot category (dice for a gaming lot, for example - can use material icons that are already bundled, or new SVGs to be bundled).

The lot category is available in the API response as 'category':

https://beta.freeso.org/LauncherResourceCentral/TrendingLots

"lots": [
    {
      "lot_id": 16708,
      "location": 17760540,
      "name": "Queen's Money Island",
      "description": "...",
      "category": 1,