refactor(NcChip): use defineSlots for proper slot definition

This resolves 2 errors reported by Typescript when building the package
(missing "private" type exports during the declaration creation).

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

Author: susnux

src/components/NcChip/NcChip.vue

@@ -111,7 +111,7 @@ export default {
 
 <script setup lang="ts">
 import { mdiClose } from '@mdi/js'
-import { computed, useSlots } from 'vue'
+import { computed } from 'vue'
 import { t } from '../../l10n.js'
 
 import NcActions from '../NcActions/NcActions.vue'
@@ -162,8 +162,15 @@ const props = withDefaults(defineProps<{
 	variant: 'secondary',
 })
 
-const emit = defineEmits(['close'])
-const slots = useSlots()
+const emit = defineEmits<{
+	close: []
+}>()
+
+const slots = defineSlots<{
+	actions(): unknown
+	default(): unknown
+	icon(): unknown
+}>()
 
 const canClose = computed(() => !props.noClose)
 const hasActions = () => Boolean(slots.actions?.())