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.

globals/notification.ts

@@ -0,0 +1,24 @@
+import icons from "modules/icons/index";
+
+export const getNotificationIcon = (app_name: string, app_icon: string, app_entry: string) => {
+    let icon: string = icons.fallback.notification;
+
+    if (Utils.lookUpIcon(app_name) || Utils.lookUpIcon(app_name.toLowerCase() || "")) {
+        icon = Utils.lookUpIcon(app_name)
+            ? app_name
+            : Utils.lookUpIcon(app_name.toLowerCase())
+                ? app_name.toLowerCase()
+                : "";
+    }
+
+    if (Utils.lookUpIcon(app_icon) && icon === "") {
+        icon = app_icon;
+    }
+
+    if (Utils.lookUpIcon(app_entry || "") && icon === "") {
+        icon = app_entry || "";
+    }
+
+    return icon;
+};
+