feat(go): add stub for google workspace client;

pro/idp/google/google.go

@@ -0,0 +1,19 @@
+package google
+
+import "github.com/gravitl/netmaker/pro/idp"
+
+type Client struct{}
+
+func NewGoogleWorkspaceClient() (*Client, error) {
+	return &Client{}, nil
+}
+
+func (g *Client) GetUsers() ([]idp.User, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (g *Client) GetGroups() ([]idp.Group, error) {
+	//TODO implement me
+	panic("implement me")
+}