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/components/search-input/index.tsx

@@ -44,6 +44,7 @@ export const SearchInput = ({
       ref={mergedRef}
       {...props}
       icon={showIcon && <RiSearchLine size={15} />}
+      size="md"
       styles={{
         icon: { svg: { fill: 'var(--btn-default-fg)' } },
         input: {