Implement `getAccessCondition` functionality from kavach module

[unniznd]

Overview

Implement the getAccessCondition function in the Python SDK to get the access condition for the given cid

Function Signature

const getAccessCondition = async (cid: string): Promise<{ data: IGetAccessCondition }>

Response Format

{'data':<conditions>}

Reference

• encryption-sdk/src/methods/getAccessCondition/index.ts at main · lighthouse-web3/encryption-sdk
• encryption-sdk/src/methods/getAccessCondition/test/getAccessCondition.test.ts at main · lighthouse-web3/encryption-sdk

[unniznd]

PR has been made #36