feat: add an API to obtain the details of the linked website

[LIlGG]

What type of PR is this?

/kind feature

What this PR does / why we need it:

增加使用链接获取对应网站基础数据的接口。

/apis/api.hyperlink.halo.run/v1alpha1/link-detail?url=https://github.com/halo-dev/halo

必要参数为 url

返回字段为：

title: string
url: string
description?: string
icon?: string
image?: string

Does this PR introduce a user-facing change?

增加使用链接获取对应网站基础数据的接口

[f2c-ci-robot]

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