Migrate to mantine v6 (#15)

* Add letter spacing to cell text

* Set window control height in px

* Add temp unused routes

* Migrate text title font weights

* Bump mantine to v6 alpha

* Migrate modals / notifications

* Increase header bar to 65px

* Adjust play button props

* Migrate various components

* Migrate various pages and root styles

* Adjust default badge padding

* Fix sidebar spacing

* Fix list header badges

* Adjust default theme

src/renderer/features/action-required/components/mpv-required.tsx

@@ -22,7 +22,7 @@ export const MpvRequired = () => {
 
   return (
     <>
-      <Text size="lg">Set your MPV executable location below and restart the application.</Text>
+      <Text>Set your MPV executable location below and restart the application.</Text>
       <Text>
         MPV is available at the following:{' '}
         <a