Equivalent to Combine's prepend operator

Hi there, I was looking for some equivalent to [Combine's prepend](https://developer.apple.com/documentation/combine/publisher/prepend(_:)-v9sb) operator but I didn't find anything. Is there any plan to introduce this feature into the structured concurrency world? Thanks!

Start by comparing the requested behavior with Apple's Combine prepend operator and review the repository's existing async algorithm operators. Done would mean a decided plan or implementation for an equivalent structured-concurrency feature, but this issue does not identify files or tests.

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