Add initial Microsoft Teams support

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

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

@@ -0,0 +1,19 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+import "time"
+
+// Shared undocumented
+type Shared struct {
+	// Object is the base model of Shared
+	Object
+	// Owner undocumented
+	Owner *IdentitySet `json:"owner,omitempty"`
+	// Scope undocumented
+	Scope *string `json:"scope,omitempty"`
+	// SharedBy undocumented
+	SharedBy *IdentitySet `json:"sharedBy,omitempty"`
+	// SharedDateTime undocumented
+	SharedDateTime *time.Time `json:"sharedDateTime,omitempty"`
+}