feat: prompt xcframework_name to avoid duplicate target names error in Xcode

[setoelkahfi]

Thanks for this crate!

I tried to generate multiple Swift packages and include them in one project, but Xcode complained about duplicate target names. This is because the generated xcframework names are all the same. Strangely, I didn't get the prompt to supply the xcframework name like the package name prompt. This PR adds that prompt, with the default name being CrateName+XCFramework.

[antoniusnaumann]

I would like to avoid prompting this. Most of the time, there is no need for seeing the xcframework name, so a command line flag is sufficient. For the same reason, I will not offer a short flag here.

I agree, however, that the default name should be crate specific, thanks for pointing this out!

[setoelkahfi]

Ok. Do you want me to close this PR? Or, I can remove the things you don't like and keep the xcframework default name change. What do you think @antoniusnaumann?

[antoniusnaumann]

Hi @setoelkahfi, sorry for not getting back to you sooner. I am not sure what exactly the situation is where you are running into issues (and hence need to set the XCFramework name).

I would be open to merge this PR, if the (1) prompt and (2) short flag are removed so this can be configured via a long-flag as sort of an expert feature