feat: full-features of dashboard widgets (#7496)

#### What type of PR is this?

/area ui
/kind feature
/milestone 2.21.x

#### What this PR does / why we need it:

Previously, although the Console dashboard was designed from the beginning to support extensions and persistent configuration, this had not yet been implemented. This PR implements a more powerful dashboard configuration, including features:

1. Support for persisting configuration data to the currently logged-in user.
2. Support for configuring different dashboards for different device sizes (responsive support).
3. Support for extending dashboard widgets through plugins.
4. More UX/UI optimizations

docs: halo-dev/docs#500

Test plugin: [plugin-widgets-test-1.0.11.jar.zip](https://github.com/user-attachments/files/20623916/plugin-widgets-test-1.0.11.jar.zip)

<img width="1663" alt="image" src="https://github.com/user-attachments/assets/cc4d78f2-25ab-4772-b43f-b16a813bcdc0" />
<img width="1662" alt="image" src="https://github.com/user-attachments/assets/e8ba8ca8-2ae9-4736-800f-6c0f062434a3" />



#### Which issue(s) this PR fixes:

Fixes #6358
Fixes #6666
Fixes #2883

#### Special notes for your reviewer:

#### Does this PR introduce a user-facing change?

```release-note
重构 Console 端仪表盘，支持响应式布局、持久化配置，支持通过插件扩展小部件。
```

Author: ruibaby

ui/console-src/modules/contents/comments/module.ts

@@ -3,12 +3,8 @@ import { IconMessage } from "@halo-dev/components";
 import { definePlugin } from "@halo-dev/console-shared";
 import { markRaw } from "vue";
 import CommentList from "./CommentList.vue";
-import CommentStatsWidget from "./widgets/CommentStatsWidget.vue";
 
 export default definePlugin({
-  components: {
-    CommentStatsWidget,
-  },
   routes: [
     {
       path: "/comments",

ui/console-src/modules/contents/comments/widgets/CommentStatsWidget.vue

@@ -6,12 +6,8 @@ import DeletedSinglePageList from "./DeletedSinglePageList.vue";
 import SinglePageEditor from "./SinglePageEditor.vue";
 import SinglePageList from "./SinglePageList.vue";
 import SinglePageSnapshots from "./SinglePageSnapshots.vue";
-import SinglePageStatsWidget from "./widgets/SinglePageStatsWidget.vue";
 
 export default definePlugin({
-  components: {
-    SinglePageStatsWidget,
-  },
   routes: [
     {
       path: "/single-pages",

ui/console-src/modules/contents/pages/module.ts

@@ -9,14 +9,8 @@ import PostList from "./PostList.vue";
 import PostSnapshots from "./PostSnapshots.vue";
 import CategoryList from "./categories/CategoryList.vue";
 import TagList from "./tags/TagList.vue";
-import PostStatsWidget from "./widgets/PostStatsWidget.vue";
-import RecentPublishedWidget from "./widgets/RecentPublishedWidget.vue";
 
 export default definePlugin({
-  components: {
-    PostStatsWidget,
-    RecentPublishedWidget,
-  },
   routes: [
     {
       path: "/posts",