chore: add example of passing bearer auth token with setup frame

[viglucci]

Provides an example of passing authentication context via a bearer token with the setup frame via composite metadata.

Motivation:

Demonstrate how to pass a bearer token or other metdata during connection/setup.

Modifications:

Added new examples and npm scripts.

start-client-server-composite-metadata-auth-setup-frame-example-client
start-client-server-composite-metadata-auth-setup-frame-example-server

Result:

Server logs:

[2024-10-15 02:38:17] Server bound...
[2024-10-15 02:38:23] Auth error during setup. Peer will be closed. Caused by: Error: Missing authentication context.
[2024-10-15 02:38:23] User connected... {"firstName":"bob","lastName":"builder"}
[2024-10-15 02:38:23] Handling EchoService.echo
[2024-10-15 02:38:24] Handling UnknownService.unknown
[2024-10-15 02:38:24] Handling AuthService.whoAmI
[2024-10-15 02:38:24] User disconnected... {"firstName":"bob","lastName":"builder"}

Client logs:

[2024-10-15 02:38:23] Rejecting once socket closes...
[2024-10-15 02:38:23] Expected error: Error: TcpDuplexConnection: Socket closed unexpectedly.
[2024-10-15 02:38:24] onNext payload[data: Echo: Hello World; metadata: null]|true
[2024-10-15 02:38:24] EchoService.echo response: Echo: Hello World
[2024-10-15 02:38:24] Expected error: Error: The encoded route was unknown by the server.
[2024-10-15 02:38:24] Expected error: Error: Composite metadata did not include routing information.
[2024-10-15 02:38:24] onNext payload[data: {"firstName":"bob","lastName":"builder"}; metadata: null]|true
[2024-10-15 02:38:24] AuthService.whoAmI response: {"firstName":"bob","lastName":"builder"}