FeatureFlags.swift has a bunch of prints making the console noisy

https://github.com/mixpanel/mixpanel-swift/blob/master/Sources/FeatureFlags.swift

FeatureFlags.swift has a bunch of prints. Can these respect `instance.loggingEnabled`?

Console is noisy.

<img width="1576" height="719" alt="Image" src="https://github.com/user-attachments/assets/0783a2ff-b47a-4421-8865-acefc08a4992" />