Add initial Microsoft Teams support

Documentation on https://github.com/42wim/matterbridge/wiki/MS-Teams-setup

vendor/github.com/yaegashi/msgraph.go/beta/ChatMessageModel.go

@@ -0,0 +1,49 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// ChatMessage undocumented
+type ChatMessage struct {
+	// Entity is the base model of ChatMessage
+	Entity
+	// ReplyToID undocumented
+	ReplyToID *string `json:"replyToId,omitempty"`
+	// From undocumented
+	From *IdentitySet `json:"from,omitempty"`
+	// Etag undocumented
+	Etag *string `json:"etag,omitempty"`
+	// MessageType undocumented
+	MessageType *ChatMessageType `json:"messageType,omitempty"`
+	// CreatedDateTime undocumented
+	CreatedDateTime *time.Time `json:"createdDateTime,omitempty"`
+	// LastModifiedDateTime undocumented
+	LastModifiedDateTime *time.Time `json:"lastModifiedDateTime,omitempty"`
+	// DeletedDateTime undocumented
+	DeletedDateTime *time.Time `json:"deletedDateTime,omitempty"`
+	// Subject undocumented
+	Subject *string `json:"subject,omitempty"`
+	// Body undocumented
+	Body *ItemBody `json:"body,omitempty"`
+	// Summary undocumented
+	Summary *string `json:"summary,omitempty"`
+	// Attachments undocumented
+	Attachments []ChatMessageAttachment `json:"attachments,omitempty"`
+	// Mentions undocumented
+	Mentions []ChatMessageMention `json:"mentions,omitempty"`
+	// Importance undocumented
+	Importance *ChatMessageImportance `json:"importance,omitempty"`
+	// PolicyViolation undocumented
+	PolicyViolation *ChatMessagePolicyViolation `json:"policyViolation,omitempty"`
+	// Reactions undocumented
+	Reactions []ChatMessageReaction `json:"reactions,omitempty"`
+	// Locale undocumented
+	Locale *string `json:"locale,omitempty"`
+	// WebURL undocumented
+	WebURL *string `json:"webUrl,omitempty"`
+	// Replies undocumented
+	Replies []ChatMessage `json:"replies,omitempty"`
+	// HostedContents undocumented
+	HostedContents []ChatMessageHostedContent `json:"hostedContents,omitempty"`
+}