New package command to generate an extract of the entire public API of a package

[FranzBusch]

Description

We often run API reviews on packages to understand their exposed symbols. For this we have to extract the public API of a package. It would be great if we could offer a built-in command to extract the public API of an entire package.

Expected behavior

No response

Actual behavior

No response

Steps to reproduce

No response

Swift Package Manager version/commit hash

No response

Swift & OS version (output of swift --version && uname -a)

No response

[yyvch]

I think swift package dump-symbol-graph might be helpful for this. Does it work for your use-case?