Configure the code to work in Injected Provider - MetaMask environment

# Configure the Code to Work in Injected Provider - MetaMask Environment

This issue addresses the need to configure the `SimpleCropSupplyChain` contract for seamless operation in the Injected Provider - MetaMask environment.

## Objective:
Ensure that the contract functions correctly when deployed and interacted with through MetaMask, handling the following scenarios:
- Creation of crops.
- Display of ownership.
- Transfer of crop ownership.
- Marking crops as delivered.
- Accurate event emission and history tracking.

## Requirements:
1. **MetaMask Integration:**
- Ensure that the contract interacts correctly with the Injected Provider (MetaMask).
- Properly handle account changes, network switching, and other MetaMask-specific events.

2. **Gas Optimization:**
- Review and optimize gas usage for functions to ensure smooth transaction processing in MetaMask.

3. **Error Handling:**
- Implement robust error handling for common MetaMask issues (e.g., user rejection of transactions, network errors).

4. **Testing:**
- Test the contract in various MetaMask-supported networks (e.g., Ropsten, Rinkeby, Mainnet).
- Ensure that all features work as expected, including crop creation, ownership transfer, and delivery tracking.

5. **Transfer of ownership**
- Provided the address of another user as the buyer the transcation should be succesfully done and the ownership of the crop has to
be transferred

## Steps to Complete:
1. Modify the contract code and configuration files to ensure compatibility with MetaMask.
2. Test the contract thoroughly in the MetaMask environment.
3. Update the documentation with any specific instructions or requirements for using MetaMask with this contract.
4. Provide a demo or example of the contract in action within the MetaMask environment.

## Additional Changes:
You can even add the transfer of MetaMask ETH between Seller and Buyer for purchasing the crop.

## Expected Outcome:
The `SimpleCropSupplyChain` contract should be fully functional within the Injected Provider - MetaMask environment, allowing users to create, transfer, and deliver crops without issues.