Initial support for Feature Flags

[jaredmixpanel]

No description provided.

[Copilot]

Pull Request Overview

This PR adds initial support for feature flags by persisting flag data, integrating a feature flag manager into the instance, and updating configuration and initialization methods.

• Added new keys and methods in MixpanelPersistence.swift to save/load flags.
• Updated MixpanelInstance.swift to conform to FeatureFlagDelegate and integrate FeatureFlagManager.
• Introduced a new MixpanelConfig class with flag configuration and updated initialization flows in Mixpanel.swift and the demo AppDelegate.

Reviewed Changes

Copilot reviewed 7 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Sources/MixpanelPersistence.swift	Added new key for flags and methods for archiving/unarchiving flag data.
Sources/MixpanelInstance.swift	Integrated FeatureFlagManager and conformed to FeatureFlagDelegate.
Sources/MixpanelConfig.swift	Introduced a new configuration class with flag support.
Sources/Mixpanel.swift	Updated initialization methods to work with the new config and flags.
MixpanelDemo/MixpanelDemo/AppDelegate.swift	Updated demo to initialize with MixpanelConfig including flags.

Files not reviewed (2)

• Mixpanel.xcodeproj/project.pbxproj: Language not supported
• MixpanelDemo/MixpanelDemo.xcodeproj/project.pbxproj: Language not supported

Comments suppressed due to low confidence (2)

Sources/Mixpanel.swift:21

• The conditional block is redundant since both branches call the same initializer; simplifying this will improve code clarity.

if let proxyServerConfig = config.proxyServerConfig { return MixpanelManager.sharedInstance.initialize(config: config) } else { return MixpanelManager.sharedInstance.initialize(config: config) }

Sources/MixpanelPersistence.swift:201

• The call to 'UserDefaults.synchronize()' is deprecated and may lead to unnecessary performance overhead; consider removing it to rely on the system's automatic synchronization.

defaults.synchronize()