[Firebase AI] Rename module to FirebaseAILogic

[andrewheard]

Renamed the FirebaseAI module to FirebaseAILogic to work around a Swift issue (swiftlang/swift#43510), which occurs when a type has the same name as the module (the FirebaseAI class and module in this case). See
"Fixing modules that contain a type with the same name" for more information. This resolves the zip distribution issue reported in #15272.

Note: Existing clients can continue to use the FirebaseAI module and import but it will be removed in a future breaking release in favour of FirebaseAILogic.

#no-changelog

[gemini-code-assist]

Code Review

This pull request refactors the FirebaseAI module by renaming it to FirebaseAILogic and introducing a new FirebaseAI wrapper module that re-exports FirebaseAILogic. This is a good structural change that aligns with patterns in other Firebase SDKs. The changes are mostly mechanical renaming across many files. I've found a couple of areas for improvement in the podspec and Swift Package Manager configuration to enhance maintainability and correctness. Overall, the changes look good.

[andrewheard]

Attempting to fix quickstart_framework_firebaseai with firebase/quickstart-ios#1783.

[gemini-code-assist]

Code Review

This pull request renames the FirebaseAI module to FirebaseAILogic to work around a Swift compiler issue. A new FirebaseAI wrapper module is introduced for backward compatibility, which is a good approach. The changes are comprehensive, updating podspecs, Swift Package Manager configurations, and tests accordingly. The implementation is solid, but I have one suggestion to improve dependency management in the podspec.