feat(llm-wiki): 迁入 llm-wiki 技能包及依赖（85 文件，含 baoyu-url-to-markdown 适配器）

llm-wiki/scripts/lib/unicode-case-folding.js

@@ -0,0 +1,68 @@
+#!/usr/bin/env node
+"use strict";
+
+const crypto = require("node:crypto");
+const fs = require("node:fs");
+const path = require("node:path");
+const { loadUnicode17NfcNormalizer } = require("./unicode-normalization");
+
+const TABLE_PATH = path.join(__dirname, "../../deps/unicode/CaseFolding-17.0.0.txt");
+const EXPECTED_HASH = "ff8d8fefbf123574205085d6714c36149eb946d717a0c585c27f0f4ef58c4183";
+
+let cached = null;
+
+function sha256(buffer) {
+  return crypto.createHash("sha256").update(buffer).digest("hex");
+}
+
+function parseUnicode17CaseFolding(text, normalizeNfc = loadUnicode17NfcNormalizer()) {
+  const mappings = new Map();
+
+  for (const rawLine of text.split(/\r?\n/)) {
+    const line = rawLine.replace(/#.*/, "").trim();
+    if (!line) continue;
+
+    const [sourceHex, status, targetHex] = line.split(";").map((part) => part.trim());
+    if (status !== "C" && status !== "F") continue;
+
+    mappings.set(
+      Number.parseInt(sourceHex, 16),
+      targetHex
+        .split(/\s+/)
+        .filter(Boolean)
+        .map((value) => String.fromCodePoint(Number.parseInt(value, 16)))
+        .join("")
+    );
+  }
+
+  return (value) => {
+    let folded = "";
+    for (const character of normalizeNfc(String(value))) {
+      folded += mappings.get(character.codePointAt(0)) || character;
+    }
+    return normalizeNfc(folded);
+  };
+}
+
+function loadUnicode17CaseFolder() {
+  if (cached) return cached;
+
+  const content = fs.readFileSync(TABLE_PATH);
+  if (sha256(content) !== EXPECTED_HASH) {
+    throw new Error(`Unicode runtime data hash mismatch for ${path.basename(TABLE_PATH)}`);
+  }
+
+  cached = parseUnicode17CaseFolding(content.toString("utf8"));
+  return cached;
+}
+
+function defaultCaseFoldUnicode17(value) {
+  return loadUnicode17CaseFolder()(value);
+}
+
+module.exports = {
+  TABLE_PATH,
+  defaultCaseFoldUnicode17,
+  loadUnicode17CaseFolder,
+  parseUnicode17CaseFolding
+};