refactor(core): replace vueuse imports with vue

packages/core/src/container/Pane/Pane.vue

@@ -1,6 +1,5 @@
 <script lang="ts" setup>
-import { ref } from 'vue'
-import { toRef } from '@vueuse/core'
+import { ref, toRef } from 'vue'
 import UserSelection from '../../components/UserSelection/UserSelection.vue'
 import NodesSelection from '../../components/NodesSelection/NodesSelection.vue'
 import type { GraphNode } from '../../types'

packages/core/src/container/Viewport/Viewport.vue

@@ -2,8 +2,7 @@
 import type { D3ZoomEvent, ZoomTransform } from 'd3-zoom'
 import { zoom, zoomIdentity } from 'd3-zoom'
 import { pointer, select } from 'd3-selection'
-import { onMounted, ref, watch } from 'vue'
-import { toRef } from '@vueuse/core'
+import { onMounted, ref, toRef, watch } from 'vue'
 import type { CoordinateExtent, D3ZoomHandler, ViewportTransform } from '../../types'
 import { PanOnScrollMode } from '../../types'
 import { useKeyPress } from '../../composables/useKeyPress'