[refactor] Migrate manager code to DDD structure (#5662)

## Summary

Reorganized custom nodes manager functionality from scattered technical
layers into a cohesive domain-focused module following [domain-driven
design](https://en.wikipedia.org/wiki/Domain-driven_design) principles.

## Changes

- **What**: Migrated all manager code from technical layers
(`src/components/`, `src/stores/`, etc.) to unified domain structure at
`src/workbench/extensions/manager/`
- **Breaking**: Import paths changed for all manager-related modules
(40+ files updated)

## Review Focus

Verify all import path updates are correct and no circular dependencies
introduced. Check that [Vue 3 composition
API](https://vuejs.org/guide/reusability/composables.html) patterns
remain consistent across relocated composables.


┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5662-refactor-Migrate-manager-code-to-DDD-structure-2736d73d3650812c87faf6ed0fffb196)
by [Unito](https://www.unito.io)

src/components/dialog/content/manager/infoPanel/tabs/WarningTabPanel.vue

@@ -1,43 +0,0 @@
-<template>
-  <div class="flex flex-col gap-3">
-    <button
-      v-if="importFailedInfo"
-      class="cursor-pointer outline-none border-none inline-flex items-center justify-end bg-transparent gap-1"
-      @click="showImportFailedDialog"
-    >
-      <i class="pi pi-code text-base"></i>
-      <span class="dark-theme:text-white text-sm">{{
-        t('serverStart.openLogs')
-      }}</span>
-    </button>
-    <div
-      v-for="(conflict, index) in conflictResult?.conflicts || []"
-      :key="index"
-      class="p-3 bg-yellow-800/20 rounded-md"
-    >
-      <div class="flex justify-between items-center">
-        <div class="text-sm break-words flex-1">
-          {{ getConflictMessage(conflict, $t) }}
-        </div>
-      </div>
-    </div>
-  </div>
-</template>
-
-<script setup lang="ts">
-import { computed } from 'vue'
-
-import { useImportFailedDetection } from '@/composables/useImportFailedDetection'
-import { t } from '@/i18n'
-import type { components } from '@/types/comfyRegistryTypes'
-import type { ConflictDetectionResult } from '@/types/conflictDetectionTypes'
-import { getConflictMessage } from '@/utils/conflictMessageUtil'
-
-const { nodePack, conflictResult } = defineProps<{
-  nodePack: components['schemas']['Node']
-  conflictResult: ConflictDetectionResult | null | undefined
-}>()
-const packageId = computed(() => nodePack?.id || '')
-const { importFailedInfo, showImportFailedDialog } =
-  useImportFailedDetection(packageId)
-</script>