Feat: disable individual title from nav

[srijitcoder]

Implemented changes

• Disable individual title from nav bar using nav: false config like -

  ## Title 2 <!-- nav="false" -->

Screenshots/Videos

https://github.com/user-attachments/assets/3e659273-8098-4645-927e-8f069ce72708

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• [x] The PR title follows conventional commit style and reflects the type of change (major/minor/patch, breaking)
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