add items to the draft: Cardano / ADA.

[aleeusgr]

Hello, I hope this finds you well.

I found it strange that Cardano is missing from this newsletter, I propose to change that.
I will relay this PR to the TxPipe (Cardano Rust developer community) discord server and hope a subject matter expert will react or comment to this PR.

Thank you!

[rvcas]

Awesome I've been meaning to make this PR but I haven't had the time.

[brson]

Thanks for the suggestions of all these projects in Cardano ecosystem that I was not aware of.

As of now I am not sure how or if we want to integrate these into the newsletter - the comparable Bitcoin and Ethereum sections have not been beneficial to the newsletter; mostly just made it bigger and harder to maintain, so we're probably not going to do the same with Cardano.

In the meantime I have made all these projects the spotlight for this month. You'll get a thanks in the newsletter @aleeusgr for the contribution.

I'm going to leave this pr open for a bit and reconsider it next month.

[aleeusgr]

Many thanks, I just received the newsletter and it looks great, I couldn't help for a better one.

If you have any questions please contact @rvcas - they are one of the developers behind these amazing tools.