Implemented strict linting standards and prettier formatting config. (#248)

* Implemented strict linting standards and prettier formatting config.

* More linter fixes and type updates.

* More linter updates and type fixes

* Remove noisy comments

* Linter and type updates

* Linter, formatting and type updates.

* Linter updates

* Type updates

* Type updates

* fixed all linter errors

* Fixed all linting, formatting and type issues.

* Resolve merge conflicts.

widget/settings/shared/components/image.ts

@@ -0,0 +1,11 @@
+import { Opt } from 'lib/option';
+import { Attribute, BoxWidget } from 'lib/types/widget';
+
+export const imageInputter = <T>(self: BoxWidget, opt: Opt<T>): Attribute => {
+    return (self.child = Widget.FileChooserButton({
+        class_name: 'image-chooser',
+        on_file_set: ({ uri }) => {
+            opt.value = uri!.replace('file://', '') as T;
+        },
+    }));
+};