The example uses `uint256` while `Socket` uses `uint32` for `chainSlug()`

[gpersoon]

Describe the bug
The example uses uint256 while Socket uses uint32 for chainSlug().
The main ISocket.sol also misses the definition for chainSlug().

To Reproduce
Check out the following code:
socketDL-examples ISocket.sol#L79:

function chainSlug() external view returns (uint256 chainSlug);

socket-DL SocketBase.sol#L19:

uint32 public immutable chainSlug;

socket-DL ISocket.sol
no definition for chainSlug()

Expected behavior

• the same type should be used everywhere (uint32)
• chainSlug() should be present to socket-DL ISocket.sol

Additional context

[arthcp]

Agree, need to upgrade examples to match the latest socket interfaces.