feat: 預設關閉 structured_data

feat: 升級一些項目依賴
feat: 重寫 README.md 和 README_CN.md，改進文檔結構和內容
feat: tags 標籤插件夜間模式調整
feat: 加按鈕懸停效果和動畫
fix: 修復右下角箭頭圖標位置沒有居中的 bug
feat: 增加右下角箭頭和滾動百分比的切換效果
improvement: 優化 tags 頁標籤雲顯示效果
improvement: 整合部分js到 init.js
improvement: 統一 CSS 變數使用，改進主題一致性

source/css/_global/index.styl

@@ -39,6 +39,65 @@
   --zoom-bg: #fff
   --mark-bg: alpha($dark-black, .3)
 
+// tags plugin
+:root
+  --btn-color: $btn-color
+  --btn-default-color: $btn-default-color
+  --tags-blue-color: $tagsP-blue-color
+  --tags-blue-color-lighten: lighten($tagsP-blue-color, 85%)
+  --tags-pink-color: $tagsP-pink-color
+  --tags-pink-color-lighten: lighten($tagsP-pink-color, 85%)
+  --tags-red-color: $tagsP-red-color
+  --tags-red-color-lighten: lighten($tagsP-red-color, 85%)
+  --tags-orange-color: $tagsP-orange-color
+  --tags-orange-color-lighten: lighten($tagsP-orange-color, 85%)
+  --tags-purple-color: $tagsP-purple-color
+  --tags-purple-color-lighten: lighten($tagsP-purple-color, 85%)
+  --tags-green-color: $tagsP-green-color
+  --tags-green-color-lighten: lighten($tagsP-green-color, 85%)
+  --note-default-border: $note-default-border
+  --note-default-bg: $note-default-bg
+  --note-default-text: $note-default-text
+  --note-modern-default-border: $note-modern-default-border
+  --note-modern-default-bg: $note-modern-default-bg
+  --note-modern-default-text: $note-modern-default-text
+  --note-modern-default-hover: $note-modern-default-hover
+  --note-primary-border: $note-primary-border
+  --note-primary-bg: $note-primary-bg
+  --note-primary-text: $note-primary-text
+  --note-modern-primary-border: $note-modern-primary-border
+  --note-modern-primary-bg: $note-modern-primary-bg
+  --note-modern-primary-text: $note-modern-primary-text
+  --note-modern-primary-hover: $note-modern-primary-hover
+  --note-info-border: $note-info-border
+  --note-info-bg: $note-info-bg
+  --note-info-text: $note-info-text
+  --note-modern-info-border: $note-modern-info-border
+  --note-modern-info-bg: $note-modern-info-bg
+  --note-modern-info-text: $note-modern-info-text
+  --note-modern-info-hover: $note-modern-info-hover
+  --note-success-border: $note-success-border
+  --note-success-bg: $note-success-bg
+  --note-success-text: $note-success-text
+  --note-modern-success-border: $note-modern-success-border
+  --note-modern-success-bg: $note-modern-success-bg
+  --note-modern-success-text: $note-modern-success-text
+  --note-modern-success-hover: $note-modern-success-hover
+  --note-warning-border: $note-warning-border
+  --note-warning-bg: $note-warning-bg
+  --note-warning-text: $note-warning-text
+  --note-modern-warning-border: $note-modern-warning-border
+  --note-modern-warning-bg: $note-modern-warning-bg
+  --note-modern-warning-text: $note-modern-warning-text
+  --note-modern-warning-hover: $note-modern-warning-hover
+  --note-danger-border: $note-danger-border
+  --note-danger-bg: $note-danger-bg
+  --note-danger-text: $note-danger-text
+  --note-modern-danger-border: $note-modern-danger-border
+  --note-modern-danger-bg: $note-modern-danger-bg
+  --note-modern-danger-text: $note-modern-danger-text
+  --note-modern-danger-hover: $note-modern-danger-hover
+
 body
   position: relative
   overflow-y: scroll