Add initial Microsoft Teams support

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

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

@@ -0,0 +1,37 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// Site undocumented
+type Site struct {
+	// BaseItem is the base model of Site
+	BaseItem
+	// DisplayName undocumented
+	DisplayName *string `json:"displayName,omitempty"`
+	// Root undocumented
+	Root *Root `json:"root,omitempty"`
+	// SharepointIDs undocumented
+	SharepointIDs *SharepointIDs `json:"sharepointIds,omitempty"`
+	// SiteCollection undocumented
+	SiteCollection *SiteCollection `json:"siteCollection,omitempty"`
+	// Analytics undocumented
+	Analytics *ItemAnalytics `json:"analytics,omitempty"`
+	// Columns undocumented
+	Columns []ColumnDefinition `json:"columns,omitempty"`
+	// ContentTypes undocumented
+	ContentTypes []ContentType `json:"contentTypes,omitempty"`
+	// Drive undocumented
+	Drive *Drive `json:"drive,omitempty"`
+	// Drives undocumented
+	Drives []Drive `json:"drives,omitempty"`
+	// Items undocumented
+	Items []BaseItem `json:"items,omitempty"`
+	// Lists undocumented
+	Lists []List `json:"lists,omitempty"`
+	// Pages undocumented
+	Pages []SitePage `json:"pages,omitempty"`
+	// Sites undocumented
+	Sites []Site `json:"sites,omitempty"`
+	// Onenote undocumented
+	Onenote *Onenote `json:"onenote,omitempty"`
+}