Core: Document Merkle Tree usage in CLI README

[EDOHWARES]

Provide examples of how to use the new Merkle Tree commands.

[IyanuOluwaJesuloba]

@IyanuOluwaJesuloba has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello Maintainer.

I am a full stack web3 developer with professional experience in software development, integration and smart contract writing.

I understand the criticality of this task, I have carried out similar implementation in my previous projects and I am confident that I will deliver accordingly.

I'd love to contribute my expertise to your project. Kindly assign this issue to me.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @IyanuOluwaJesuloba to this issue.

[drips-wave]

Congratulations, @IyanuOluwaJesuloba! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @IyanuOluwaJesuloba: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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