embedded arborist.js file & common func for pkg extracting

pkg/tree/arborist.js

@@ -1,60 +0,0 @@
-const Arborist = require("@npmcli/arborist");
-const fs = require("fs");
-
-async function getDependencyTree(packageName) {
-  const arb = new Arborist({
-    registry: "https://registry.npmjs.org",
-    token: "",
-    authToken: "",
-  });
-  try {
-    const idealTree = await arb.buildIdealTree({
-      add: [packageName],
-    });
-    const packageNames = [];
-    idealTree.children.forEach((node) => {
-      packageNames.push(`${node.name}@${node.version}`);
-    });
-    return packageNames;
-  } catch (error) {
-    console.error(`Failed to fetch dependency tree for ${packageName}:`, error);
-    return [];
-  }
-}
-
-/**
- * Write dependency list to a file
- * @param {string[]} packages - List of package dependencies
- * @param {string} filename - Output filename
- */
-function writeToFile(packages, filename) {
-  try {
-    fs.writeFileSync(filename, packages.join("\n"), "utf8");
-    console.log(`Dependencies written to ${filename}`);
-  } catch (error) {
-    console.error(`Failed to write to file ${filename}:`, error);
-    process.exit(1);
-  }
-}
-
-const packageArg = process.argv[2];
-const outputFile = process.argv[3];
-
-if (!packageArg) {
-  console.error("Please provide a package name as an argument");
-  process.exit(1);
-}
-
-if (!outputFile) {
-  console.error("Please provide an output filename as the second argument");
-  process.exit(1);
-}
-
-getDependencyTree(packageArg)
-  .then((packages) => {
-    writeToFile(packages, outputFile);
-  })
-  .catch((err) => {
-    console.error("Error:", err);
-    process.exit(1);
-  });