Document desktop deployment technologies such as ClickOnce for .NET 5

[nakarnam]

This issue will track the docs plan for creating an area in the guide related to deploying .NET 5 windows desktop apps. This is outside of a specific client technology such as WPF or WinForms. The content should be written as a tutorial (how to write a tutorial / file template)

General information

• .NET Deployment Tools repo

ClickOnce

• .NET 5 ClickOnce spec
• .NET 5 RC2 Blog post detailing info about ClickOnce

Outline

1. Introduction
   1. Why it's beneficial
   2. Alternatives such as VS
   3. Differences from .NET Fx ClickOnce
   4. Contribution guide linked to ClickOnce GitHub
2. Install mage global tool
3. Publish
   1. Note security concerns
4. Deploy
5. Install
6. Update
   1. Installer project
7. Samples and walkthroughs
8. Troubleshooting
   1. Launcher update availability diagnostics
9. Mage reference (link to cli docs)

Potential article placement

It's possible that the file could be written once and shared between different TOCs.

WPF

Repo file: https://github.com/dotnet/docs-desktop/tree/master/dotnet-desktop-guide/net/wpf/publish/clickonce.md
TOC location:

• Windows Presentation Foundation for .NET
• Get started
  • ...
• Migration
  • ...
• Fundamentals
  • ...
• Work with data
  • ...
• Publish with ClickOnce

WinForms

Repo file: https://github.com/dotnet/docs-desktop/tree/master/dotnet-desktop-guide/net/winforms/publish/clickonce.md
TOC location:

• Windows Forms for .NET
• What's New
• Get started
  • ...
• Migration
  • ...
• Forms
  • ...
• Controls
  • ...
• User input - keyboard
  • ...
• User input - mouse
  • ...
• Publish with ClickOnce