init: edu-content 内容库骨架（L1-L4 四层数据模型 + B类迁移 + lint/CI 工具）

structured/exams/ket/vocab/word-sets.json

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+{
+  "note": "Appendix 1 Word sets 为开放集合(官方原文用 etc.), 此处按规则生成确定词集。国家/语言/民族名开放集合未枚举, 需另行补表。",
+  "levels": [
+    "A2",
+    "B1"
+  ],
+  "sets": [
+    {
+      "name": "Cardinal numbers (one to one hundred + hundred/thousand)",
+      "words": [
+        "eight",
+        "eighteen",
+        "eighty",
+        "eighty-eight",
+        "eighty-five",
+        "eighty-four",
+        "eighty-nine",
+        "eighty-one",
+        "eighty-seven",
+        "eighty-six",
+        "eighty-three",
+        "eighty-two",
+        "eleven",
+        "fifteen",
+        "fifty",
+        "fifty-eight",
+        "fifty-five",
+        "fifty-four",
+        "fifty-nine",
+        "fifty-one",
+        "fifty-seven",
+        "fifty-six",
+        "fifty-three",
+        "fifty-two",
+        "five",
+        "forty",
+        "forty-eight",
+        "forty-five",
+        "forty-four",
+        "forty-nine",
+        "forty-one",
+        "forty-seven",
+        "forty-six",
+        "forty-three",
+        "forty-two",
+        "four",
+        "fourteen",
+        "hundred",
+        "nine",
+        "nineteen",
+        "ninety",
+        "ninety-eight",
+        "ninety-five",
+        "ninety-four",
+        "ninety-nine",
+        "ninety-one",
+        "ninety-seven",
+        "ninety-six",
+        "ninety-three",
+        "ninety-two",
+        "one",
+        "seven",
+        "seventeen",
+        "seventy",
+        "seventy-eight",
+        "seventy-five",
+        "seventy-four",
+        "seventy-nine",
+        "seventy-one",
+        "seventy-seven",
+        "seventy-six",
+        "seventy-three",
+        "seventy-two",
+        "six",
+        "sixteen",
+        "sixty",
+        "sixty-eight",
+        "sixty-five",
+        "sixty-four",
+        "sixty-nine",
+        "sixty-one",
+        "sixty-seven",
+        "sixty-six",
+        "sixty-three",
+        "sixty-two",
+        "ten",
+        "thirteen",
+        "thirty",
+        "thirty-eight",
+        "thirty-five",
+        "thirty-four",
+        "thirty-nine",
+        "thirty-one",
+        "thirty-seven",
+        "thirty-six",
+        "thirty-three",
+        "thirty-two",
+        "thousand",
+        "three",
+        "twelve",
+        "twenty",
+        "twenty-eight",
+        "twenty-five",
+        "twenty-four",
+        "twenty-nine",
+        "twenty-one",
+        "twenty-seven",
+        "twenty-six",
+        "twenty-three",
+        "twenty-two",
+        "two"
+      ]
+    },
+    {
+      "name": "Ordinal numbers (first to thirty-first)",
+      "words": [
+        "first",
+        "second",
+        "third",
+        "fourth",
+        "fifth",
+        "sixth",
+        "seventh",
+        "eighth",
+        "ninth",
+        "tenth",
+        "eleventh",
+        "twelfth",
+        "thirteenth",
+        "fourteenth",
+        "fifteenth",
+        "sixteenth",
+        "seventeenth",
+        "eighteenth",
+        "nineteenth",
+        "twentyth",
+        "twenty-first",
+        "twenty-second",
+        "twenty-third",
+        "twenty-fourth",
+        "twenty-fifth",
+        "twenty-sixth",
+        "twenty-seventh",
+        "twenty-eighth",
+        "twenty-ninth",
+        "thirtieth",
+        "thirty-first"
+      ]
+    },
+    {
+      "name": "Days of the week",
+      "words": [
+        "Monday",
+        "Tuesday",
+        "Wednesday",
+        "Thursday",
+        "Friday",
+        "Saturday",
+        "Sunday"
+      ]
+    },
+    {
+      "name": "Months of the year",
+      "words": [
+        "January",
+        "February",
+        "March",
+        "April",
+        "May",
+        "June",
+        "July",
+        "August",
+        "September",
+        "October",
+        "November",
+        "December"
+      ]
+    },
+    {
+      "name": "Seasons of the year",
+      "words": [
+        "spring",
+        "summer",
+        "autumn",
+        "winter"
+      ]
+    },
+    {
+      "name": "Continents",
+      "words": [
+        "Africa",
+        "Antarctica",
+        "Asia",
+        "Australia",
+        "Europe",
+        "North America",
+        "South America"
+      ]
+    }
+  ]
+}