replaced readme.txt to readme.md

Closes #3421037

README.md

+# Legger Next V 0000
+
+The Legger Next V 0000 module is a Drupal module designed for testing variable
+configuration settings.
+
+For a full description of the module, visit the
+[project page](https://www.drupal.org/project/leggernextv0000).
+
+Submit bug reports and feature suggestions, or track changes in the
+[issue queue](https://www.drupal.org/project/issues/leggernextv0000).
+
+
+## Table of contents
+
+- Requirements
+- Installation
+- Configuration
+- Maintainers
+
+
+## Requirements
+
+This module requires no modules outside of Drupal core.
+
+
+## Installation
+
+Install as you would normally install a contributed Drupal module. For further
+information, see
+[Installing Drupal Modules](https://www.drupal.org/docs/extending-drupal/installing-drupal-modules).
+
+
+## Configuration
+
+1. Enable the module at Administration > Extend.
+
+
+## Maintainers
+
+- [JulioLegger](https://www.drupal.org/u/juliolegger)