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/revenuecat.ts

@@ -30,6 +30,7 @@ import {
   type RcState, type RcStep, resolveApps, wantedRevenueCat,
 } from './lib/revenuecat';
 import { textTable } from './lib/table';
+import * as rt from './lib/rt';
 
 const TAG = 'revenuecat';
 const ORIGIN = 'https://api.revenuecat.com';
@@ -63,7 +64,7 @@ export function rcClient(key: string, o: { retries?: number } = {}): RcClient {
         const s = Math.min(60, Math.max(0, Number(r.headers.get('retry-after') ?? '5') || 0));
         warn(TAG, `rate limited, waiting ${s}s`);
         await r.body?.cancel();
-        await Bun.sleep(s * 1000);
+        await rt.sleep(s * 1000);
         continue;
       }
       const text = await r.text();