feat: setup dataverse client dummy interface

Author: amimart

dataverse/client.go

@@ -0,0 +1,8 @@
+package dataverse
+
+import "context"
+
+type Client interface {
+	GetGovAddr(context.Context, string) (string, error)
+	ExecGov(context.Context, string, string) (interface{}, error)
+}