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.

customModules/PollVar.ts

@@ -69,7 +69,6 @@ export const pollVariableBash = <T>(
         });
     };
 
-    // Set up the interval initially with the provided polling interval
     Utils.merge([pollingInterval, ...trackers], (pollIntrvl: number) => {
         intervalFn(pollIntrvl);
     });