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/popupwindow.d.ts

@@ -0,0 +1,27 @@
+import { Widget } from "types/widgets/widget";
+import { WindowProps } from "types/widgets/window";
+import { Transition } from "./widget";
+
+export type PopupWindowProps = {
+    name: string;
+    child: any;
+    layout?: Layouts;
+    transition?: any;
+    exclusivity?: Exclusivity;
+} & WindowProps;
+
+export type LayoutFunction = (
+    name: string,
+    child: Widget,
+    transition: Transition
+) => {
+    center: () => Widget;
+    top: () => Widget;
+    "top-right": () => Widget;
+    "top-center": () => Widget;
+    "top-left": () => Widget;
+    "bottom-left": () => Widget;
+    "bottom-center": () => Widget;
+    "bottom-right": () => Widget;
+};
+export type Layouts = 'center' | 'top' | 'top-right' | 'top-center' | 'top-left' | 'bottom-left' | 'bottom-center' | 'bottom-right';