Add README and copyright

LICENSE

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 MIT License
 
+Copyright (c) 2022 Matt Mower
 Copyright (c) 2018 VladimirUAZ
 
 Permission is hereby granted, free of charge, to any person obtaining a copy

README.md

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+## Collapse Region Extension for Visual Studio
+
+Two new commands are exposed:
+
+- `RegionManagement.Expand` - Default shortcut: CTRL+R, CTRL+Num +
+- `RegionManagement.Collapse` - Default shortcut: CTRL+R, CTRL+Num -
+
+These shortcuts can be remapped in Tools > Options > Environment > Keyboard.
+
+Recognized regions:
+
+- `#region` - .cs files
+- `<!--region` - .xaml files
+- `#pragma region` - .cpp files
+
+### Compatibility
+
+- Visual Studio 2022
+- Visual Studio 2019
+- Visual Studio 2017
+
+### Build
+
+Visual Studio 2022 is required to build the solution. Note that `Microsoft.VisualStudio.SDK` should have major version corresponding to the version of Visual Studio where the extension will run (e.g. nuget version 16.x for VS2019) and `Microsoft.VSSDK.BuildTools` should have major version corresponding to the version of Visual Studio that is used to _build_ the extension.
+
+### Additional Information
+
+This extension was forked from [Vlad-Herus/CollapseRegionExtension](https://github.com/Vlad-Herus/CollapseRegionExtension).
+
+Copyright (c) 2022 Matt Mower  
+Copyright (c) 2018 VladimirUAZ