feat：support sorting tags by post count (#7414)

#### What type of PR is this?

/kind feature

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

标签支持根据文章量排序

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

```release-note
标签支持根据文章量排序
```

application/src/main/java/run/halo/app/infra/SchemeInitializer.java

@@ -342,6 +342,11 @@ public class SchemeInitializer implements ApplicationListener<ApplicationContext
                 .setName("spec.slug")
                 .setIndexFunc(simpleAttribute(Tag.class, tag -> tag.getSpec().getSlug()))
             );
+            indexSpecs.add(new IndexSpec()
+                .setName("status.postCount")
+                .setIndexFunc(simpleAttribute(Tag.class,
+                    tag -> defaultIfNull(tag.getStatus().getPostCount(), 0).toString()))
+            );
             indexSpecs.add(new IndexSpec()
                 .setName(Tag.REQUIRE_SYNC_ON_STARTUP_INDEX_NAME)
                 .setIndexFunc(simpleAttribute(Tag.class, tag -> {

ui/console-src/modules/contents/posts/tags/TagList.vue

@@ -238,6 +238,10 @@ watch(selectedTagNames, (newVal) => {
                     ),
                     value: 'spec.displayName,asc',
                   },
+                  {
+                    label: t('core.post.tag.filters.sort.items.post_desc'),
+                    value: 'status.postCount,desc',
+                  },
                 ]"
               />
               <div class="flex flex-row gap-2">

ui/src/locales/_missing_translations_es.yaml

@@ -68,6 +68,7 @@ core:
             create_time_asc: Earliest Created
             display_name_desc: Descending order by tag name
             display_name_asc: Ascending order by tag name
+            post_desc: Most Posts
     batch_setting_modal:
       title: Post batch settings
       fields:

ui/src/locales/en.yaml

@@ -222,6 +222,7 @@ core:
             create_time_asc: Earliest Created
             display_name_desc: Descending order by tag name
             display_name_asc: Ascending order by tag name
+            post_desc: Most Posts
     batch_setting_modal:
       title: Post batch settings
       fields:

ui/src/locales/zh-CN.yaml

@@ -210,6 +210,7 @@ core:
             create_time_asc: 较早创建
             display_name_desc: 标签名降序
             display_name_asc: 标签名升序
+            post_desc: 最多文章量
     batch_setting_modal:
       title: 文章批量设置
       fields:

ui/src/locales/zh-TW.yaml

@@ -231,6 +231,7 @@ core:
             create_time_asc: 較早建立
             display_name_desc: 標籤名稱降序
             display_name_asc: 標籤名稱升序
+            post_desc: 最多文章量
   deleted_post:
     title: 文章回收站
     empty: