Add plain TCP example to getTcpPort container doc

[th0m]

Summary

Add plain TCP example to getTcpPort container doc

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.

[hyperlint-ai]

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PR Change Summary

Added a plain TCP example to the getTcpPort container documentation to illustrate its usage.

• Introduced a new TCP example for the getTcpPort container method
• Demonstrated how to connect and handle request body piping using TCP
• Updated documentation to enhance clarity and usability

Modified Files

• src/content/docs/durable-objects/api/container.mdx

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