docs: add badges to README (#239)

Signed-off-by: Luis Mastrangelo <[email protected]>

README.md

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 # Hedera Forking for System Contracts
 
+[![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/hashgraph/hedera-forking/test.yml?style=flat-square)](https://github.com/hashgraph/hedera-forking/actions/workflows/test.yml)
+[![npm](https://img.shields.io/npm/v/@hashgraph/system-contracts-forking?style=flat-square)](https://www.npmjs.com/package/@hashgraph/system-contracts-forking)
+![downloads](https://img.shields.io/npm/dt/@hashgraph/system-contracts-forking?style=flat-square)
+[![License](https://img.shields.io/github/license/hashgraph/hedera-forking?style=flat-square)](LICENSE)
+[![Discord](https://img.shields.io/badge/discord-join%20chat-blue.svg)](https://hedera.com/discord)
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 **This projects allows Smart Contract developers working on Hedera to use fork testing while using Hedera System Contracts.**
 It does so by providing an emulation layer for the [Hedera Token Service](https://hedera.com/token-service) _(more System Contracts to come)_ written in Solidity.
 Given it is written in Solidity, it can be executed in a forked network environment, such as