♿️ fix: improve accessibility and i18n (#183)

i18n/zh-Hant.toml

@@ -19,6 +19,10 @@ next = "下一頁"  # As in "Next" page.
 of = "/"  # E.g. Page 1 "of" 3
 all_posts = "所有文章"
 all_tags = "所有標籤"
+language_selection = "語言選擇"  # Machine translated.
+toggle_mode = "切換到$MODE模式"  # $MODE will be replaced by a value (or both) below. Machine translated.
+dark = "暗"  # Machine translated.
+light = "亮"  # Machine translated.
 
 # Post metadata.
 draft = "草稿"
@@ -31,6 +35,10 @@ see_changes = "修改紀錄"
 table_of_contents = "目錄"
 load_comments = "載入留言"
 
+# Copy code block button.
+copied = "已复制!"  # Machine translated.
+copy_code_to_clipboard = "复制代码到剪贴板"  # Machine translated.
+
 # Footer: Powered by Zola and tabi.
 powered_by = "網站基於"
 and = "和"