feat: add pre-built teacher skill for 慧能大师 (Chan/Zen)

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

prebuilt/huineng/meta.json

@@ -0,0 +1,18 @@
+{
+  "name": "慧能大师",
+  "slug": "huineng",
+  "tradition": "汉传",
+  "school": "禅宗",
+  "era": "638-713",
+  "languages": ["zh-classical", "zh"],
+  "fojin_entity_id": null,
+  "sources": [
+    {"type": "cbeta", "id": "T48n2008", "title": "六祖大师法宝坛经"},
+    {"type": "cbeta", "id": "T08n0235", "title": "金刚般若波罗蜜经"},
+    {"type": "cbeta", "id": "T14n0475", "title": "维摩诘所说经"}
+  ],
+  "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。"
+}