通过json生成site-card

支持v3.2.2+ 通过本地（source文件夹下）或者远程json文件，生成site-card标签集

json文件格式如下:

[
    {
        "title": "yuang01",
        "url": "https://hexo-theme-bamboo.netlify.app/",
        "avatar": "https://hexo-theme-bamboo.netlify.app/img/avatar.jpg",
        "screenshot": "https://picx.zhimg.com/80/v2-d7666d074ec59ca4cf14f15c5f891643_1440w.webp",
        "description": "hexo主题bamboo"
    },
    {
        "title": "yuang01",
        "url": "https://hexo-theme-bamboo.netlify.app/",
        "avatar": "https://hexo-theme-bamboo.netlify.app/img/avatar.jpg",
        "screenshot": "https://pic1.zhimg.com/80/v2-d27db7c61bbe3ecb8d493d31bf835b28_1440w.webp",
        "description": "hexo主题bamboo"
    },
    {
        "title": "yuang01",
        "url": "https://hexo-theme-bamboo.netlify.app/",
        "avatar": "https://hexo-theme-bamboo.netlify.app/img/avatar.jpg",
        "screenshot": "https://picx.zhimg.com/80/v2-17001eba7a69aea9477299f8140e12ab_1440w.webp",
        "description": "hexo主题bamboo"
    },
    {
        "title": "yuang01",
        "url": "https://hexo-theme-bamboo.netlify.app/",
        "avatar": "https://hexo-theme-bamboo.netlify.app/img/avatar.jpg",
        "screenshot": "https://picx.zhimg.com/80/v2-3486dae2687982e8a141c23d922b9936_1440w.webp",
        "description": "hexo主题bamboo"
    },
    {
        "title": "yuang01",
        "url": "https://hexo-theme-bamboo.netlify.app/",
        "avatar": "https://hexo-theme-bamboo.netlify.app/img/avatar.jpg",
        "screenshot": "https://pic1.zhimg.com/80/v2-034e77303e502886d0ea6130f44127ed_1440w.webp",
        "description": "hexo主题bamboo"
    },
    {
        "title": "yuang01",
        "url": "https://hexo-theme-bamboo.netlify.app/",
        "avatar": "https://hexo-theme-bamboo.netlify.app/img/avatar.jpg",
        "screenshot": "https://picx.zhimg.com/80/v2-1781005004b2681e722e68aab7bf68c3_1440w.webp",
        "description": "hexo主题bamboo"
    }
]

url 字段可以替换为href字段，表示要跳转的地址
title 字段可以替换为name，表示名称
avatar 字段可以替换为touxiang，表示头像
screenshot 字段可以替换为cover，表示封面图片
description 字段可以替换为desc，表示描述