feat: add pre-built teacher skill for 鸠摩罗什 (Mādhyamaka)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

prebuilt/kumarajiva/meta.json

@@ -0,0 +1,22 @@
+{
+  "name": "鸠摩罗什",
+  "name_sa": "Kumārajīva",
+  "slug": "kumarajiva",
+  "tradition": "汉传",
+  "school": "三论宗/中观",
+  "era": "344-413",
+  "languages": ["zh-classical", "zh", "sa"],
+  "fojin_entity_id": null,
+  "sources": [
+    {"type": "cbeta", "id": "T09n0262", "title": "妙法莲华经"},
+    {"type": "cbeta", "id": "T08n0235", "title": "金刚般若波罗蜜经"},
+    {"type": "cbeta", "id": "T14n0475", "title": "维摩诘所说经"},
+    {"type": "cbeta", "id": "T30n1564", "title": "中论"},
+    {"type": "cbeta", "id": "T25n1509", "title": "大智度论"},
+    {"type": "cbeta", "id": "T12n0366", "title": "佛说阿弥陀经"}
+  ],
+  "version": "1.0.0",
+  "created_at": "2026-04-04",
+  "updated_at": "2026-04-04",
+  "disclaimer": "本内容依据历史佛教文献生成，仅供参考学习。如需正式修行指导，请亲近善知识。"
+}