refactor(core): use vue-flow__marker on marker defs el

packages/core/src/container/EdgeRenderer/EdgeRenderer.vue

@@ -72,9 +72,7 @@ export default {
 
 <template>
   <template v-if="dimensions.width && dimensions.height">
-    <svg class="vue-flow__edges vue-flow__container">
     <MarkerDefinitions />
-    </svg>
 
     <svg
       v-for="edge of getEdges"

packages/core/src/container/EdgeRenderer/MarkerDefinitions.vue

@@ -50,6 +50,7 @@ export default {
 </script>
 
 <template>
+  <svg class="vue-flow__marker">
     <defs>
       <MarkerSymbols
         v-for="marker of markers"
@@ -64,4 +65,5 @@ export default {
         :orient="marker.orient"
       />
     </defs>
+  </svg>
 </template>

packages/core/src/container/EdgeRenderer/MarkerSymbols.vue

@@ -1,6 +1,6 @@
 <script lang="ts" setup>
-import { MarkerType } from '../../types/edge'
-import type { MarkerProps } from '../../types/edge'
+import { MarkerType } from '../../types'
+import type { MarkerProps } from '../../types'
 
 const {
   id,