Removed DAN tutorials

[B-Venkatesh7210]

PR-Codex overview

This PR focuses on cleaning up the sidebar configuration of the documentation by removing references to the DAN tutorial and restructuring the sidebar items for better formatting.

Detailed summary

• Deleted the entire DAN tutorial section from the sidebar.
• Reformatted the sidebar items for Send a simple transaction and Send transactions batch to improve readability.
• Standardized object formatting in the sidebar.
• Updated the topNav section to improve consistency in item formatting.
• Removed trailing commas in some objects for cleaner syntax.

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Name	Status	Preview	Comments	Updated (UTC)
documentation	❌ Failed (Inspect)			Oct 22, 2024 7:52pm

[himanshugarg06]

@B-Venkatesh7210 Could you fix the build error?