Adding ADOPTERS file to the project (#2055)

Issue #, if available:

Description of changes:
Adding adopters file to the project.

Created a place holder entry, for the first user that will be added
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Author: tsahiduek

ADOPTERS.md

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+# Who is using ACK?
+This file is created to show who's using ACK.
+
+The following is a self-reported list of users to help identify adoption and points of contact.
+
+## Community
+If you would like to ask question from the community please join the [weekly community meeting](./README.md/#community-meeting).
+
+## Add yourself
+If you are using ACK please consider adding yourself as a user by opening a pull request to this file.
+If you are open to others contacting you about your use of ACK on the Kubernets Slack workspace, add your Slack name as well. The ACK slack channel name is  [aws-controllers-k8s](https://kubernetes.slack.com/archives/C0402D8JJS1)
+
+## Adopters (Alphabetical)
+
+| Organization | Description | Contacts | Link |
+| --- | --- | --- | --- |
+| Anycompany | provisioning S3 Bucket as part of the application delivery | `@Any User` |  |
+