Add initial Microsoft Teams support

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

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

@@ -0,0 +1,42 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import (
+	"encoding/json"
+	"time"
+)
+
+// UserActivity undocumented
+type UserActivity struct {
+	// Entity is the base model of UserActivity
+	Entity
+	// VisualElements undocumented
+	VisualElements *VisualInfo `json:"visualElements,omitempty"`
+	// ActivitySourceHost undocumented
+	ActivitySourceHost *string `json:"activitySourceHost,omitempty"`
+	// ActivationURL undocumented
+	ActivationURL *string `json:"activationUrl,omitempty"`
+	// AppActivityID undocumented
+	AppActivityID *string `json:"appActivityId,omitempty"`
+	// AppDisplayName undocumented
+	AppDisplayName *string `json:"appDisplayName,omitempty"`
+	// ContentURL undocumented
+	ContentURL *string `json:"contentUrl,omitempty"`
+	// CreatedDateTime undocumented
+	CreatedDateTime *time.Time `json:"createdDateTime,omitempty"`
+	// ExpirationDateTime undocumented
+	ExpirationDateTime *time.Time `json:"expirationDateTime,omitempty"`
+	// FallbackURL undocumented
+	FallbackURL *string `json:"fallbackUrl,omitempty"`
+	// LastModifiedDateTime undocumented
+	LastModifiedDateTime *time.Time `json:"lastModifiedDateTime,omitempty"`
+	// UserTimezone undocumented
+	UserTimezone *string `json:"userTimezone,omitempty"`
+	// ContentInfo undocumented
+	ContentInfo json.RawMessage `json:"contentInfo,omitempty"`
+	// Status undocumented
+	Status *Status `json:"status,omitempty"`
+	// HistoryItems undocumented
+	HistoryItems []ActivityHistoryItem `json:"historyItems,omitempty"`
+}