Add initial Microsoft Teams support

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

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

@@ -0,0 +1,17 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// SkillProficiency undocumented
+type SkillProficiency struct {
+	// ItemFacet is the base model of SkillProficiency
+	ItemFacet
+	// Categories undocumented
+	Categories []string `json:"categories,omitempty"`
+	// DisplayName undocumented
+	DisplayName *string `json:"displayName,omitempty"`
+	// Proficiency undocumented
+	Proficiency *SkillProficiencyLevel `json:"proficiency,omitempty"`
+	// WebURL undocumented
+	WebURL *string `json:"webUrl,omitempty"`
+}