Backend Implementation for Bitcoin-like Server Project

[axatbhardwaj]

This pull request includes the backend implementation for a Bitcoin-like server project. The PR introduces the following key components:

Central Server (centralServer.js):
    Implements the central WebSocket server responsible for broadcasting new transactions to all connected miners.
    Manages connections
    Broadcasts newly minted blocks to rest of the miners 
    Adjusts difficulty accordingly to match the desired average blocktime
    Manages txn pool for the chain and keeps it in sync (removes txns which are included in the block from pool)

Miner Server (minerServer.js):
    Implements the miner server code where each miner maintains its own transaction pool.
    Handles block mining and interacts with the central server to receive new transactions.
    Mines blocks according to a fixed interval (e.g., every 30 seconds)

Blockchain Utilities (blockchainUtils.js):
    Provides utility functions for blockchain operations, including block creation, transaction handling, and other essential blockchain-related operations.

Important Notes:

This PR is strictly for the backend implementation and does not include any frontend components.
The mining process has been designed to operate independently on each miner server, ensuring decentralized processing.

Please review the implementation and provide feedback or suggestions

[sachinshrmaa]

do u want me to build the UI? @axatbhardwaj ?

[rahmatdeep]

is the gitignore file autogenerated or is there some tool to generate this, kindly share

[axatbhardwaj]

is the gitignore file autogenerated or is there some tool to generate this, kindly share

https://github.com/github/gitignore

[rahmatdeep]

Thanks