Title: Add an introductory series of infographics in Blockchain Development

[pakhare]

Is your feature request related to a problem? Please describe.

The Blockchain Development track has remained untouched and needs to address basic introduction. This is as part of GSSoC contribution.

Describe the solution you'd like.

I have created an Infographic series which can onboard naive user to blockchain. I would like it to be added to the blockchain development track.

Describe alternatives you've considered.

I had considered writing a small introduction, but I think Infographic will work better.

Add any other context or screenshots about the feature request here.

One of the infographic for example.

[github-actions[bot]]

@pakhare

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