add(taskwarrior): merge of server side changes for milestones

internal/diff/diff.go

@@ -0,0 +1,11 @@
+package diff
+
+import "fmt"
+
+func Prompt(value, theirs, mine string) string {
+	// TODO: create tmp file with the corresponding contents
+	// open tmp file using the $EDITOR environment variable
+	// parse and return output of tmp file after $EDITOR execution has been completed
+	fmt.Printf("\tPrompting for value: '%s'\n", value)
+	return value
+}