Add composer.json file for better local development.

Problem/Motivation

When developing custom modules there are several scenarios that require the developer to add a composer.json file to their module. Some of these scenarios depend upon whether the custom module is intended to be contributed back to the community as a project on drupal.org. Here are some reasons for creating a composer.json file

https://www.drupal.org/docs/develop/using-composer/add-a-composerjson-file

Steps to reproduce

Proposed resolution

Add a composer.json file

Remaining tasks

Approve and merge

User interface changes

N/A

API changes

N/A

Data model changes

N/A