Use fully qualified names for inputs

pkg/protodump/fixtures/test.proto

@@ -5,8 +5,8 @@ package hello.world;
 option go_package = "./;helloworld";
 
 service Greeter {
-  rpc SayHello (HelloRequest) returns (HelloReply) {}
+  rpc SayHello (.hello.world.HelloRequest) returns (.hello.world.HelloReply) {}
-  rpc StreamMethodServer (StreamRequest) returns (stream StreamReply) {}
+  rpc StreamMethodServer (.hello.world.StreamRequest) returns (stream .hello.world.StreamReply) {}
 }
 
 message Reserved {

pkg/protodump/proto.go

@@ -55,12 +55,14 @@ func (pd *ProtoDefinition) writeMethod(method protoreflect.MethodDescriptor) {
 	if method.IsStreamingClient() {
 		pd.write("stream ")
 	}
-	pd.write(string(method.Input().Name()))
+	pd.write(".")
+	pd.write(string(method.Input().FullName()))
 	pd.write(") returns (")
 	if method.IsStreamingServer() {
 		pd.write("stream ")
 	}
-	pd.write(string(method.Output().Name()))
+	pd.write(".")
+	pd.write(string(method.Output().FullName()))
 	pd.write(") {}\n")
 }