CLI runs on Node 20+: npx storebound (bunx keeps working)

- cli/lib/rt.ts: the runtime layer on node: modules (spawn / spawnSync with Bun's defaults, exit codes and
  "Executable not found", which with PATHEXT, sleep, serve, Glob, hasher, gunzip, stdin, SQLite, packageRoot,
  config imports with a type-stripping fallback for Node 20); every Bun.* use in cli/ goes through it
- tools/gen-embedded.ts -> cli/lib/embedded.ts: templates/, cli/shots/*.html and Play's Data safety form embedded
  (replaces Bun text imports; the bundle and the compiled sidecar carry them), checked fresh by bun run ci
- package.json: bin dist/storebound.mjs (Node ESM bundle, tools/build-node.ts, prepack), engines node >=20
- bun run ci: node bundle + node smoke (real node: --version, help, check same as Bun, scan, release plan --help,
  init, MCP handshake + tool call); Forgejo CI sets up Node 20; tests/node-compat.test.ts guards cli/
- install writes npx MCP commands when run with Node; bin/storebound falls back to Node
- docs: npx storebound init (Node 20+) or bunx storebound init

cli/listing.ts

@@ -22,6 +22,7 @@ import {
 } from './lib/listing-translate';
 import { textTable } from './lib/table';
 import { resolveLanguages } from './lib/whats-new';
+import * as rt from './lib/rt';
 
 const TAG = 'listing';
 const storeCode = (l: Language): string => l.apple ?? playCodes(l)[0] ?? l.id;
@@ -60,7 +61,7 @@ async function translate(ctx: Ctx): Promise<void> {
   const dry = a.has('dry');
   const rows: Row[] = [];
   const runHook = (text: string, l: Language, st: 'apple' | 'play', field: string, limit: number): string | null => {
-    const r = Bun.spawnSync(['sh', '-c', hook!], { stdin: new TextEncoder().encode(text), stdout: 'pipe', stderr: 'pipe',
+    const r = rt.spawnSync(['sh', '-c', hook!], { stdin: new TextEncoder().encode(text), stdout: 'pipe', stderr: 'pipe',
       env: { ...process.env, STOREBOUND_SOURCE_LANG: storeCode(src), STOREBOUND_TARGET_LANG: st === 'apple' ? l.apple ?? l.id : playCodes(l)[0] ?? l.id, STOREBOUND_TARGET_LANG_ID: l.id,
         STOREBOUND_STORE: st, STOREBOUND_FIELD: field, STOREBOUND_LIMIT: String(limit) } });
     const out = r.stdout.toString().trim();