feat: add Swift modules and an iOS application

[cgrindel]

Type of change

Add Swift modules and an iOS application to the repository to demonstrate:

• Use of rules_swift and rules_apple.
• Import of an external Swift package (e.g., SwifterSwift) using rules_swift_package_manager.
• Integration with Xcode using rules_xcodeproj.

Chores

• Update Bazel version to 6.3.2.
• Update Go dependencies to latest.
• Update Gazelle declaration to include Swift plugin.

Test plan

• New test cases added

Unit tests can be run using bazel test //.... The UI tests for the iOS application can be run using bazel test //ios/LoggingClient/UITests.

[CLAassistant]

All committers have signed the CLA.

[alexeagle]

Thanks!

[cgrindel]

@alexeagle When you get a chance, could you approve the workflow? I have the tests working on MacOS and Ubuntu. I just want to be sure that the CI works properly.

[cgrindel]

@alexeagle I just updated the bazelrc to output more info about the UITest failure in CI. Could you approve the workflow?

[alexeagle]

I turned off that setting for now, I didn't mean to block your PRs on that approval!

[cgrindel]

I guess that UI test failure did not occur again. 🤷‍♂️