Til7701/request-sink

AI Summary: The issue requests the implementation of a feature to calculate and display the length of the body in bytes. This body length information should be presented within a new 'body metadata' section, positioned specifically between the end of the headers and the start of the body content in the output.

AI Summary: Enhance the existing CLI application 'request-sink' to allow users to specify a custom HTTP status code for the responses it generates. This involves adding a command-line option or configuration setting to control the response status code, modifying the application's logic to use the specified code, and updating the documentation to reflect the new feature.