fix: v1.3.3 — firmware, fedimint perms, GRUB fallback, data dirs, Rust warnings

- Add firmware-linux-nonfree to ISO (fixes missing Realtek NIC firmware)
- Pre-create nbxplorer/Main and btcpay/Main data directories
- Fix fedimint data dir permissions (chmod 775 for non-root container)
- GRUB GFX fallback: gfxpayload=keep + console fallback for incompatible hardware
- Kill stale Chromium before kiosk restart (prevents duplicate processes)
- Suppress Rust warnings: #[allow(dead_code)] on run_boot_reconciliation,
  #[allow(unused_assignments)] on history_dirty
- Version bump to 1.3.3

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

core/archipelago/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "archipelago"
-version = "1.3.2"
+version = "1.3.3"
 edition = "2021"
 description = "Archipelago Bitcoin Node OS - Native backend"
 authors = ["Archipelago Team"]