feat: add iOS starter

[alexeagle]

FYI @luispadron this template will create the content of the bazel-starters/apple GH repo
FYI @cgrindel in case I've misused Swift Package Manager or mislead developers on the best way to get started.
FYI @aaronsky for naming things

[alexeagle]

@aaronsky maybe you could help me out getting this green?

[luispadron]

@alexeagle Is it maybe this issue? https://github.com/bazelbuild/apple_support?tab=readme-ov-file#bazel-7-setup (e.g. apple_support must go above rules_cc).

Is there a way to see the final contents of the starter project?

[alexeagle]

Yeah you can expand the "Scaffold new app" in the log, I dump all the file contents there.

[luispadron]

Yeah you can expand the "Scaffold new app" in the log, I dump all the file contents there.

Ah nice, yeah it looks like apple_support is below rules_cc which is maybe leading to that toolchain issue

[alexeagle]

I switched the order of those two, same error I think:

(01:40:10) ERROR: /home/runner/work/aspect-workflows-template/aspect-workflows-template/scaffold_test_6572/app/BUILD:9:16: While resolving toolchains for target //app:iOSApp (1538463): No matching toolchains found for types:
  @@bazel_tools//tools/cpp:toolchain_type
To debug, rerun with --toolchain_resolution_debug='@@bazel_tools//tools/cpp:toolchain_type'

[CLAassistant]

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