feat: cli launcher npx kandev (#39)

* feat: cli launcher

* feat: improved debug

apps/cli/src/bundle.ts

@@ -0,0 +1,37 @@
+import AdmZip from "adm-zip";
+import fs from "node:fs";
+import path from "node:path";
+
+export function extractZip(zipPath: string, destDir: string): void {
+  const zip = new AdmZip(zipPath);
+  zip.extractAllTo(destDir, true);
+}
+
+export function ensureExtracted(zipPath: string, destDir: string): void {
+  const marker = path.join(destDir, ".extracted");
+  if (fs.existsSync(marker)) {
+    return;
+  }
+  extractZip(zipPath, destDir);
+  fs.writeFileSync(marker, "");
+}
+
+export function findBundleRoot(cacheDir: string): string {
+  const candidate = path.join(cacheDir, "kandev");
+  if (fs.existsSync(candidate)) {
+    return candidate;
+  }
+  return cacheDir;
+}
+
+export function resolveWebServerPath(bundleDir: string): string | null {
+  const direct = path.join(bundleDir, "web", "server.js");
+  if (fs.existsSync(direct)) {
+    return direct;
+  }
+  const nested = path.join(bundleDir, "web", "apps", "web", "server.js");
+  if (fs.existsSync(nested)) {
+    return nested;
+  }
+  return null;
+}