Add ICSI to README.md

[agustinustheo]

Key Features of ICP Sub-Account Indexer

• Subaccount Management: Effortlessly add and manage subaccounts with SHA224 encryption for unique IDs.
• Transaction Tracking: Efficiently list and clear transactions to keep track of all subaccount activities.
• Fund Sweeping: Automatically sweep funds from subaccounts to a main user vault, simplifying fund consolidation.

On-Chain Advantages

The ICP Sub-Account Indexer operates on a decentralized network, eliminating single points of failure and enhancing security. Users have full control over their data and assets in a transparent and auditable environment.

Technical Overview

• Languages: Rust
• Canister Methods: Add subaccounts, list transactions, clear transactions, sweep funds, issue refunds, retrieve canister status

Current Status

We have successfully tested the core functionalities of the ICP Sub-Account Indexer. Developers are invited to engage with the tool, test its capabilities, and provide feedback to help refine and enhance its functionality.

Our project is fully open-source, and you can visit our repository at GitHub.

To see how it works, check out our Live Demo Video!

We've also made a post in the DFINITY forum.

[sa-github-api]

Dear @agustinustheo,

In order to potentially merge your code in this open-source repository and therefore proceed with your contribution, we need to have your approval on DFINITY's CLA.

If you decide to agree with it, please visit this issue and read the instructions there. Once you have signed it, re-trigger the workflow on this PR to see if your code can be merged.

— The DFINITY Foundation

[flyq]

lgtm

[agustinustheo]

Is there anything else I need to do to get this PR merged? @flyq