Add initial Microsoft Teams support

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

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

@@ -0,0 +1,17 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// AgreementFile undocumented
+type AgreementFile struct {
+	// Entity is the base model of AgreementFile
+	Entity
+	// Language undocumented
+	Language *string `json:"language,omitempty"`
+	// FileName undocumented
+	FileName *string `json:"fileName,omitempty"`
+	// FileData undocumented
+	FileData *AgreementFileData `json:"fileData,omitempty"`
+	// IsDefault undocumented
+	IsDefault *bool `json:"isDefault,omitempty"`
+}