Deploy: RP loops (no single-shot) + confirm DOSBox needs no bundled DLLs

- net-boot/loop_rp.bat: GO.BAT-style netnub loop for RP (mirror of loop.bat,
  retargeted to rpl4opt). deploy/net_rp.conf.tmpl now calls it instead of the
  single-shot netnub + DOS pause -- the deployable runs in a loop until the
  supervisor kills DOSBox (per operator: no single-shot in the product).
- DLL closure resolved: dosbox-x.exe is a 182MB STATIC build -- import table is
  only Windows system DLLs, delay-import table empty, libpng/SDL/zlib embedded.
  Nothing to bundle; wpcap.dll comes from the Npcap install. package.ps1's "no
  DLLs" case is now informational, and the plan/README note the static build.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

emulator/net-boot/loop_rp.bat

@@ -0,0 +1,10 @@
+echo off
+rem GO.BAT-style loop for Red Planet (mirror of loop.bat, retargeted to rpl4opt):
+rem keep relaunching netnub so the pod stays connected to the console and picks up
+rem a mission whenever one is queued. Runs until the supervisor kills DOSBox.
+:go
+32rtm.exe -x
+netnub -p -f rpl4opt > c:\rel410\rp\nn.log
+32rtm.exe -u
+echo ===== netnub cycle ended -- reconnecting to console =====
+goto go