Add wimtools and startnet.cmd editor for boot.wim modification

- Added wimtools to offline packages and playbook verification
- Webapp startnet.cmd editor: extract, view, edit, save back to boot.wim
- Uses wimextract/wimupdate for in-place WIM modification
- Dark-themed code editor with tab support and common command reference

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

playbook/pxe_server_setup.yml

@@ -16,6 +16,7 @@
         - ufw
         - cron
         - ansible
+        - wimtools
       register: pkg_check
       failed_when: false
       changed_when: false
@@ -374,6 +375,7 @@
           WorkingDirectory=/opt/pxe-webapp
           Environment=SAMBA_SHARE={{ samba_share }}
           Environment=CLONEZILLA_SHARE=/srv/samba/clonezilla
+          Environment=WEB_ROOT={{ web_root }}
           ExecStart=/opt/pxe-webapp/venv/bin/python app.py
           Restart=always
           RestartSec=5