Add user privacy settings to control user events

[nuno-vieira]

🔗 Issue Links

Resolves https://github.com/GetStream/ios-issues-tracking/issues/774

🎯 Goal

Allow the user to control whether he wants to share, read, or type events.

📝 Summary

• Adds UserPrivacySettings to ChatClient.connectUser()
• Adds UserPrivacySettings to CurrentUserController.updateUserData()
• Adds ChatCurrentUser.privacySettings
• Only send typing events if ChatCurrentUser.privacySettings.typingIndicator.enabled
• Allow to edit user privacy settings in the Demo App Configuration.
• Allow to edit user privacy settings in the Demo App Profile View.

🧪 Manual Testing Notes

• Open Demo App Configuration
• Enable/Disable typing indicators and read indicators
• When connecting the user, the connectUser call in proxyman should include the privacy settings
• If typing events are disabled, when sending a message, it should not send typing events (Check with another device and user)
• if read receipts are disabled, when reading a message, it should not appear in the delivery receipts of the other user
• Do the same when updating the user profile (Open the user profile view and update the privacy settings)

☑️ Contributor Checklist

• [x] I have signed the Stream CLA (required)
• [x] This change follows zero ⚠️ policy (required)
• [x] This change should be manually QAed
• [x] Changelog is updated with client-facing changes
• [x] New code is covered by unit tests
• [ ] Comparison screenshots added for visual changes
• [ ] Affected documentation updated (docusaurus, tutorial, CMS)