Submitting Alchemy Viewer 6.3.6.46699 (#2685)

* Submitting SitdownMW version 1.0.0.0

Used to keep Modern Warfare's process running at 'normal' execution priority.

* Update 1.0.0.0.yaml

* Submitting Default Audio 1.0.0.0

* Submitting Alchemy Viewer

* Update 6.3.6.46699.yaml

Apparently winget does not support multiple installers currently.

manifests/Alchemy/Viewer/6.3.6.46699.yaml

@@ -0,0 +1,16 @@
+Id: Alchemy.Viewer
+Publisher: Alchemy Development Group
+Version:  6.3.6.46699
+AppMoniker: Alchemy
+Name: Alchemy Viewer
+Tags: "Second Life, viewer, sl, open metaverse, openmetaverse, opensim, open sim"
+Description: Alchemy is a Second Life™ and OpenMetaverse compatible viewer striving to be at the forefront of stability, performance, and technological advancement in the open-source metaverse viewer field. We are always based on the latest release code from Linden Lab, and are currently in active development with new features, bug fixes, and performance optimizations landing in our source code repository nearly every day!
+Homepage: https://alchemyviewer.org/
+License: Copyright (C) 2019 Alchemy Development Group
+InstallerType: nullsoft
+Installers:
+- Arch: x64
+  Scope: machine
+  Url: https://pkg.alchemyviewer.org/repository/viewer/alchemy/beta/6.3.6.46699/Alchemy_Beta_6_3_6_46699_x86_64_Setup.exe
+  Sha256: 5078a4457aea8b31e9598d4ede65596986afbafad9d0aa85f925a34f5f6a32b0
+...