Teamwork and communications: 10 API change passages

Added the resource teamworkApplicationIdentity to represent applications in Microsoft Teams. This new type derives from identity and adds additional information to represent the type of application (bot, Azure AD application, and so on). Added the resource teamworkUserIdentity to represent users in Microsoft Teams. This new type derives from identity and adds additional information to represent the type of user. Added the resource teamworkConversationIdentity to represent conversations (team, channel, or chat) in Microsoft Teams. This new type derives from identity and adds additional information to represent the type of conversation. Added the resource teamworkTagIdentity to represent tags in Microsoft Teams. This new type derives from identity. Added the enumeration teamworkApplicationIdentityType to represent types of applications (bot, Azure AD application, and so on) in Microsoft Teams. Added the enumeration teamworkConversationIdentityType to represent types of conversations (chat, channel, or team) in Microsoft Teams. Added the enumeration teamworkUserIdentityType to represent types of users (Azure AD user, anonymous guest, and so on) in Microsoft Teams. Added the resource chatMessageFromIdentitySet to represent the sender of a chatMessage. No changes have been made to JSON representation of chatMessage. Added the resource chatMessageMentionedIdentitySet to represent the user or application that is @mentioned in a chatMessage. No changes have been made to JSON representation of chatMessage. Added the resource chatMessageReactionIdentitySet to represent user who reacted to a chatMessage. No changes have been made to JSON representation of chatMessage.