functions added into Contracts to improve

[cryptoryda]

Contracts safety

What this PR contain :

• [1] Checks of if it is owner or not in HelloWormhole.sol
  :- This checks is helpful then regular require statements.
  :- also there is a recieve() fallback function to handle unexpected Ether transfers.

- modifier onlyWormholeRelayer() {
        require(msg.sender == address(wormholeRelayer), "Only relayer allowed");
        _;
    }

• [2] Functions added into HelloWormholeProtections.sol

• 1. HelloWormholeProtections.sol

• 2. setGreeting

• [3] constructor value changed in HelloWormholeConfirmation.sol

- constructor(
        address _wormholeRelayer,
        address _wormhole,
        uint16 _chainId
    ) Base(_wormholeRelayer, _wormhole) {
        chainId = _chainId;
    }