Next iOS major version plan

[marandaneto]

Description

• Codable support
• Remove deprecated fields
• Completion handler support
• Migrate to Swift 6 (and strong concurrency?)
• setup method should take the projectToken and not the PostHogConfig
• async/await instead of callbacks
• strongly typed PostHogEvent.properties for known values but still accepts any key/value?
• breakdown session replay and error tracking in modules to reduce binary size due to libp and plcrashreporter and also naming clashes
• Remove fields eg properties.build in favor of only properties.$app_build, maybe there are more similar to this one
• Remove session replay wireframe mode?
• Simplify config file (eg sessionReplay should be part of PostHogSessionReplayConfig)
• Remove internal fields that are public
• Config should be nullable and prefer remote config if not set (eg sessionReplay = false (false), sessionReplay = true && remote config is true (true), sessionReplay = nil && remote config is true (true), this matches the JS SDK)
• Prob a bunch of ideas from this