Migrate to Mantine v8 and Design Changes (#961)

* mantine v8 migration

* various design changes and improvements

src/shared/components/kbd/kbd.tsx

@@ -0,0 +1,7 @@
+import { Kbd as MantineKbd, KbdProps as MantineKbdProps } from '@mantine/core';
+
+export interface KbdProps extends MantineKbdProps {}
+
+export const Kbd = (props: KbdProps) => {
+    return <MantineKbd {...props} />;
+};