test: add scaling large messages test package

tests/scaling-large-messages/.eslintignore

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+dist

tests/scaling-large-messages/README.md

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+# RoseNet scaling large messages test
+
+## Table of contents
+
+- [Introduction](#introduction)
+- [Usage](#usage)
+
+## Introduction
+
+RoseNet scaling large messages test
+
+## Usage
+
+You need to have [OpenTofu](https://opentofu.org/) installed. Then, after
+[passing required variables](https://opentofu.org/docs/language/values/variables/#assigning-values-to-root-module-variables) (defined in [`variables.tf`](./variables.tf)),
+run the following commands. It should complete with no errors.
+
+```bash
+tofu init
+tofu apply
+```
+
+Finally run `tofu destroy` to destroy the infrastructure.