Add Basic TCP Server Example (Fixes #619)

[bhushan-mdn]

Hello,

This Pull Request introduces a focused implementation for a basic TCP Server, directly addressing Issue #619 and incorporating the feedback provided in the review of PR #631.

The goal is to provide the simplest, most educational example of network programming with the net package for beginners.

Implementation Details

• Simplicity and Focus: The example consists of a single server implementation (tcp-server.go) that handles concurrent connections using goroutines.
• Testing: Aligned with project suggestions, the accompanying script (tcp-server.sh) uses the standard system utility netcat (nc) for testing the connection and response cycle.

Request for Input on Scope

Before I submit further networking examples, I would appreciate guidance on the overall scope:

1. Is this sufficient? Should we merge this minimal TCP Server example now?
2. Should I expand the set? Would you prefer a consolidated approach in a single future PR that adds other primitives (e.g., TCP Client, UDP Server/Client)?

Thank you for your time and review!

[eliben]

This looks good, thank you. Let's get it reviewed and submitted first, and then a TCP client sample can be added separately

[bhushan-mdn]

Hi @eliben ,

I've pushed the requested changes:

• Simplified the comments around listener.Accept() & handleConnection and the main loop to focus on purpose rather than implementation (removed goroutine mention).
• Removed unnecessary comment above log.

Please let me know if it looks good. Thanks again for the feedback!

[eliben]

Thank you, this is sufficiently close. Will merge and adjust locally