Migrate to Mantine v8 and Design Changes (#961)

* mantine v8 migration

* various design changes and improvements

src/shared/utils/create-polymorphic-component.ts

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+import { createPolymorphicComponent as mantineCreatePolymorphicComponent } from '@mantine/core';
+
+export const createPolymorphicComponent = mantineCreatePolymorphicComponent;

src/shared/utils/create-use-external-events.ts

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+import { createUseExternalEvents as mantineCreateUseExternalEvents } from '@mantine/core';
+
+export const createUseExternalEvents = mantineCreateUseExternalEvents;