Add initial Microsoft Teams support

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

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

@@ -0,0 +1,13 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// FileHash undocumented
+type FileHash struct {
+	// Object is the base model of FileHash
+	Object
+	// HashType undocumented
+	HashType *FileHashType `json:"hashType,omitempty"`
+	// HashValue undocumented
+	HashValue *string `json:"hashValue,omitempty"`
+}