ThreadNetwork iOS 14.5 to 15.0 API Differences

Added THClient

Added -[THClient init]

Added -[THClient retrieveAllCredentials:]

Added -[THClient deleteCredentialsForBorderAgent:completion:]

Added -[THClient retrieveCredentialsForBorderAgent:completion:]

Added -[THClient storeCredentialsForBorderAgent:activeOperationalDataSet:completion:]

Added -[THClient retrievePreferredCredentials:]

Added -[THClient retrieveCredentialsForExtendedPANID:completion:]

Added THCredentials

Added THCredentials.networkName

Added THCredentials.extendedPANID

Added THCredentials.borderAgentID

Added THCredentials.activeOperationalDataSet

Added THCredentials.networkKey

Added THCredentials.PSKC

Added THCredentials.channel

Added THCredentials.panID

Added THCredentials.creationDate

Added THCredentials.lastModificationDate