feat: add fund-atm CLI for generating ATM funding invoices

Standalone Node.js script that generates a Lightning invoice for
the ATM's Lightning.Pub account. Reads config from .env, connects
to the relay, creates an invoice via Nostr RPC, displays a QR code
in the terminal, and prints the BOLT11.

Bundled as self-contained CJS with esbuild (all dependencies inlined)
so it works from the nix store without separate node_modules.

Usage: fund-atm <amount_sats>
  e.g. fund-atm 100000
       fund-atm 100000 sats

Added to NixOS systemPackages for both live and installed configs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/machine/package.json

@@ -14,7 +14,7 @@
     "dev": "concurrently -n vite,electron \"vite\" \"pnpm run electron:dev\"",
     "dev:vite": "vite",
     "electron:dev": "tsc -p electron/tsconfig.json && tsc -p electron/tsconfig.preload.json && electron dist-electron/main.js",
-    "build": "vue-tsc --noEmit && vite build && tsc -p electron/tsconfig.json && tsc -p electron/tsconfig.preload.json",
+    "build": "vue-tsc --noEmit && vite build && tsc -p electron/tsconfig.json && tsc -p electron/tsconfig.preload.json && npx esbuild electron/fund-atm.ts --bundle --platform=node --format=cjs --outfile=dist-electron/fund-atm.bundle.cjs",
     "build:electron": "pnpm build && electron-builder",
     "preview": "vite preview",
     "typecheck": "vue-tsc --noEmit",
@@ -27,8 +27,8 @@
     "@lamassu/nostr-client": "workspace:*",
     "@lamassu/state-machine": "workspace:*",
     "@scure/base": "^1.2.0",
-    "better-sqlite3": "^11.0.0",
     "@vueuse/core": "^14.1.0",
+    "better-sqlite3": "^11.0.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "lucide-vue-next": "^0.563.0",
@@ -48,6 +48,7 @@
     "concurrently": "^9.0.0",
     "electron": "^33.0.0",
     "electron-builder": "^25.0.0",
+    "esbuild": "^0.27.4",
     "tailwindcss": "^4.0.0",
     "tw-animate-css": "^1.4.0",
     "typescript": "^5.7.0",