fix: guide template page breaks and card back interleaving (#2133)

[Adarshkumar0509]

Resolves #2133

Description

Changes
scripts/convert.py

• Fixed _validate_command_args() to skip backslash check on the
  executable path argument on Windows, allowing LibreOffice PDF
  conversion to work correctly on Windows systems

resources/templates/owasp_cornucopia_webapp_ver_guide_bridge_lang.odt

• Added page break before Frequently Asked Questions section so it always starts at the top of a new page
• Inserted card back page after each suit's front card sheet so the guide can be printed front and back naturally on a desktop printer

resources/templates/owasp_cornucopia_webapp_ver_guide_bridge_qr_lang.odt

• Applied same fixes as bridge template above

Testing

• Tested locally on Windows with Python 3.13 and LibreOffice
• Verified FAQ starts at top of new page in generated PDF
• Verified blue back page follows each card front sheet
• Tested bridge template with all 10 languages: en, es, fr, nl, no-nb, pt-br, pt-pt, it, ru, hu — all pass
• Tested bridge_qr template with all available languages all pass

Note on CI failures

• Build and run COPI Tests failure is pre-existing and unrelated to this PR, only Python scripts and ODT templates were modified

All fixes were verified locally by generating and inspecting the PDF output.

AI Tool Disclosure

• Yes My contribution does not include any AI-generated content .All things are done by me

Affirmation

• My code follows the CONTRIBUTING.md guidelines

[Adarshkumar0509]

@sydseter is this looks good to you
and
and also done back side .

[Adarshkumar0509]

@sydseter sir I also verified for 2-3 other languages also my fix is working .

[sydseter]

@Adarshkumar0509 there is a conflict you need to resolve.

[sydseter]

I have added some additional comment in the issue. I think it would be better if we change the direction a little.

[Adarshkumar0509]

Yeah sure from now I will also try to inc coverage to 95.

[Adarshkumar0509]

hii @sydseter sir, have a look at this and The ClusterFuzzLite failures are caused by mypy==1.20.0 introducing an unpinned librt dependency on master unrelated to my changes. Please review when you get a chance.

[Adarshkumar0509]

If you have any suggestions on how I could have approached this better or anything I missed, I'd really appreciate the feedback it will help me improve.

[Adarshkumar0509]

hii @sydseter sir , can you take a look at this?

[sydseter]

This is a step in the right direction.