docs: added licence and readme

LICENSE

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+MIT License
+
+Copyright (c) 2021 Chris Lloyd-Jones
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# powerbi-adt
+[![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/) ![GitHub issues](https://img.shields.io/github/issues/Sealjay-clj/powerbi-adt) ![GitHub](https://img.shields.io/github/license/Sealjay-clj/powerbi-adt) ![GitHub Repo stars](https://img.shields.io/github/stars/Sealjay-clj/powerbi-adt?style=social)
+
+## Overview
+An example showing how to query [Azure Digital Twins](https://docs.microsoft.com/en-us/azure/digital-twins/how-to-manage-twin#create-a-digital-twin) from within PowerBI.
+
+powerbi-adt is available under the [MIT Licence](./LICENCE).
+
+Implemented use cases:
+- List all twins
+
+## Contact
+Feel free to contact me [on Twitter](https://twitter.com/sealjay_clj). For bugs, please [raise an issue on GitHub](https://github.com/Sealjay-clj/powerbi-adt/issues).
+
+## Contributing
+Contributions are more than welcome! This repository uses the [GitHub flow](https://guides.github.com/introduction/flow/) - and you can choose to use [Commitizen](https://github.com/commitizen/cz-cli#making-your-repo-commitizen-friendly) to support the use of [semantic commits](https://nitayneeman.com/posts/understanding-semantic-commit-messages-using-git-and-angular/#common-types). (`npm install -g commitizen cz-customizable`and then `git cz`- easy!)