Feature/disable appendices - This Pull Request addresses and resolves Issue #460.

[Deekshit014]

What does this PR do?

This Pull Request resolves Issue #460.

It implements a new optional command-line flag, --disable-appendices, for the cloudsplaining scan command.

When the flag is used, it prevents the HTML report from rendering the Guidance and Appendices tabs, allowing users to generate a streamlined report without supplementary documentation.

Technical Changes:

• Modified cloudsplaining/command/scan.py and cloudsplaining/output/report.py to accept and propagate the new boolean flag.
• Updated cloudsplaining/output/template.html to expose the flag to the global JavaScript context, allowing the Vue.js application to conditionally hide the tabs and content.

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Completion checklist

• Additions and changes have unit tests
• The pull request has been appropriately labeled using the provided PR labels
• GitHub actions automation is passing (make test, make lint, make security-test, make test-js)
• If the UI contents or JavaScript files have been modified, generate a new example report:
  • Local testing confirmed correct behavior (tabs hidden with flag, visible without).

# Generate the updated Javascript bundle
make build-js

# Generate the example report
make generate-report

[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @Deekshit014 to sign the Salesforce Inc. Contributor License Agreement.

[gruebel]

Done via #475