feat: add the notification mechanism implementation

[guqing]

What type of PR is this?

/kind feature
/milestone 2.10.x
/area core

What this PR does / why we need it:

新增消息和通知机制的实现

how to test it?

1. 执行以下命令配置发件服务

curl -u admin:admin -X POST 'http://localhost:8090/apis/api.console.halo.run/v1alpha1/notifiers/default-email-notifier/senderConfig' \
--header 'Content-Type: application/json' \
--data-raw '{
    "displayName": "Halo Team",
    "username": "{发件使用的邮箱}",
    "password": "{发件邮箱密码}",
    "host": "smtp.exmail.qq.com",
    "port": "587"
}'

2. 评论文章或页面可以收到通知
3. 文章/页面作者是评论者不发送新评论通知，回复者是评论作者不发送回复通知

Which issue(s) this PR fixes:

Fixes #4045

Does this PR introduce a user-facing change?

新增消息和通知机制的实现

[f2c-ci-robot]

@guqing: The provided milestone is not valid for this repository. Milestones in this repository: [1.6.x, 2.7.x, 2.8.x, 2.9.0, 2.9.x, Backlog]

Use /milestone clear to clear the milestone.

In response to this:

What type of PR is this?

/kind feature
/milestone 2.10.x
/area core

What this PR does / why we need it:

新增消息和通知机制的实现

Which issue(s) this PR fixes:

Fixes #4045

Does this PR introduce a user-facing change?

新增消息和通知机制的实现

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[codecov]

Codecov Report

Merging #4527 (9604758) into main (86db26a) will increase coverage by 0.73%.
The diff coverage is 70.23%.

@@             Coverage Diff              @@
##               main    #4527      +/-   ##
============================================
+ Coverage     61.05%   61.79%   +0.73%     
- Complexity     2610     2780     +170     
============================================
  Files           379      402      +23     
  Lines         13606    14568     +962     
  Branches        960     1009      +49     
============================================
+ Hits           8307     9002     +695     
- Misses         4832     5077     +245     
- Partials        467      489      +22     

Files	Coverage Δ
.../app/core/extension/reconciler/PostReconciler.java	68.42% <100.00%> (+2.38%)	⬆️
...a/run/halo/app/event/post/CommentCreatedEvent.java	100.00% <100.00%> (ø)
...ava/run/halo/app/event/post/ReplyCreatedEvent.java	100.00% <100.00%> (ø)
...ain/java/run/halo/app/infra/SchemeInitializer.java	100.00% <100.00%> (ø)
...otification/DefaultNotificationTemplateRender.java	100.00% <100.00%> (ø)
...cation/ReasonNotificationTemplateSelectorImpl.java	100.00% <100.00%> (ø)
...alo/app/plugin/SharedApplicationContextHolder.java	97.14% <100.00%> (+0.59%)	⬆️
...app/security/authorization/AuthorizingVisitor.java	80.00% <ø> (+6.66%)	⬆️
...pp/security/authorization/DefaultRuleResolver.java	75.00% <100.00%> (+3.20%)	⬆️
...n/halo/app/security/authorization/RequestInfo.java	93.54% <100.00%> (+0.44%)	⬆️
... and 27 more

... and 2 files with indirect coverage changes

[guqing]

/ping @halo-dev/sig-halo

[ruibaby]

/approve

[JohnNiang]

/lgtm

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JohnNiang, ruibaby

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Needs approval from an approver in each of these files:

• OWNERS [JohnNiang,ruibaby]

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