Add license and readme

LICENSE

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+Copyright (c) 2021 William Turner
+
+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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+AfinityEx
+=========
+
+Primitive plugin injection system for Serif Affinity products.
+
+Greatly inspired by [BepInEx](https://github.com/BepInEx/BepInEx) and from
+which the name is derived. [Harmony](https://github.com/pardeike/Harmony) is
+used to hook into the original application code to wire plugins in relevant
+places.
+
+This repository includes 2 proof of concept plugins demonstrating the
+capabilities. One is bundled directly in the `Launcher` project to provide UI
+feedback of which plugins are active. The other is in the `Plugins` project and
+adds extra keyboard shorcuts to Affinity Designer that made the author's life
+better and prompted this whole endeavour.
+
+No precompiled release will be provided at the moment since, while the author
+has had good success so far, nothing is fully tested or vetted for daily usage.
+You are encouraged to inspect, improve and compile the code yourself.
+
+![](/screenshot.png)
+
+Legal Disclaimer
+----------------
+
+This project is licensed under the [MIT license](/LICENSE).
+
+Use at your own risk, the author, contributors and Serif Europe Ltd. cannot be
+held liable for corrupted files, loss of work or any other issue that could
+arise by using the project and any derived plugin. You recognise that you are
+"on your own" and that Serif will be unable to assist you in any way, support
+will only be provided by the author and contributors on best effort basis.
+
+This project is not associated in any way with Serif Europe Ltd.
+
+"Serif" and "Affinity" are both registered trademarks of Serif Europe Ltd.