Add initial Microsoft Teams support

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

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

@@ -0,0 +1,19 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// LookupColumn undocumented
+type LookupColumn struct {
+	// Object is the base model of LookupColumn
+	Object
+	// AllowMultipleValues undocumented
+	AllowMultipleValues *bool `json:"allowMultipleValues,omitempty"`
+	// AllowUnlimitedLength undocumented
+	AllowUnlimitedLength *bool `json:"allowUnlimitedLength,omitempty"`
+	// ColumnName undocumented
+	ColumnName *string `json:"columnName,omitempty"`
+	// ListID undocumented
+	ListID *string `json:"listId,omitempty"`
+	// PrimaryLookupColumnID undocumented
+	PrimaryLookupColumnID *string `json:"primaryLookupColumnId,omitempty"`
+}