Added strict type checking to the project. (#236)

* Implement strict typing (WIP).

* changes

* Finish type checks

* Fix notification icon, matugen settings and update tsconfig.

* OSD Styling updates and added the ability to configure OSD duration.

lib/types/weather.d.ts

@@ -1,3 +1,5 @@
+import { weatherIcons } from "modules/icons/weather";
+
 export type UnitType = "imperial" | "metric";
 
 export type Weather = {
@@ -107,3 +109,10 @@ export type Location = {
     localtime_epoch: number;
     localtime: string;
 }
+
+export type TemperatureIconColorMap = {
+    [key: number]: string;
+}
+
+export type WeatherIconTitle = keyof typeof weatherIcons;
+export type WeatherIcon = typeof weatherIcons[WeatherIconTitle];