feat: add approvedTime for comment and reply (#2746)

#### What type of PR is this?
/kind feature
/milestone 2.0.0-rc.1
/kind api-change
/area core

#### What this PR does / why we need it:
评论和回复新增 approvedTime 属性
1. 此属性在创建时如果是不需要审核就公开的则会填充当前时间
2. 目前没有审核功能，审核是 Console 端去更新的 approved 字段，因此需要更新 approved 时判断有没有设置 approvedTime 没有则填充当前时间，后续有审核功能后则再由后端处理

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

Fixes #2738

#### Special notes for your reviewer:
/cc @halo-dev/sig-halo 
#### Does this PR introduce a user-facing change?

```release-note
评论和回复新增 approvedTime 属性
```

src/main/java/run/halo/app/content/comment/CommentServiceImpl.java

@@ -2,10 +2,12 @@ package run.halo.app.content.comment;
 
 import static run.halo.app.extension.router.selector.SelectorUtil.labelAndFieldSelectorToPredicate;
 
+import java.time.Instant;
 import java.util.Comparator;
 import java.util.Objects;
 import java.util.function.Function;
 import java.util.function.Predicate;
+import org.apache.commons.lang3.BooleanUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.security.core.context.ReactiveSecurityContextHolder;
 import org.springframework.stereotype.Component;
@@ -81,6 +83,10 @@ public class CommentServiceImpl implements CommentService {
                 }
                 comment.getSpec()
                     .setApproved(Boolean.FALSE.equals(commentSetting.getRequireReviewForNew()));
+                if (BooleanUtils.isTrue(comment.getSpec().getApproved())
+                    && comment.getSpec().getApprovedTime() == null) {
+                    comment.getSpec().setApprovedTime(Instant.now());
+                }
                 comment.getSpec().setHidden(false);
                 if (comment.getSpec().getOwner() != null) {
                     return Mono.just(comment);

src/main/java/run/halo/app/content/comment/ReplyServiceImpl.java

@@ -6,6 +6,7 @@ import java.time.Instant;
 import java.util.Comparator;
 import java.util.function.Function;
 import java.util.function.Predicate;
+import org.apache.commons.lang3.BooleanUtils;
 import org.springframework.security.core.context.ReactiveSecurityContextHolder;
 import org.springframework.stereotype.Service;
 import reactor.core.publisher.Flux;
@@ -62,6 +63,11 @@ public class ReplyServiceImpl implements ReplyService {
                         reply.getSpec().setApproved(
                             Boolean.FALSE.equals(commentSetting.getRequireReviewForNew()));
                         reply.getSpec().setHidden(!reply.getSpec().getApproved());
+
+                        if (BooleanUtils.isTrue(reply.getSpec().getApproved())
+                            && reply.getSpec().getApprovedTime() == null) {
+                            reply.getSpec().setApprovedTime(Instant.now());
+                        }
                         return reply;
                     });
             })

src/main/java/run/halo/app/core/extension/Comment.java

@@ -65,6 +65,8 @@ public class Comment extends AbstractExtension {
 
         private String ipAddress;
 
+        private Instant approvedTime;
+
         @Schema(required = true, defaultValue = "0")
         private Integer priority;