Add an extensions.json file

[bruinbrown]

If we add an extensions.json file to the SAFE template we can prompt users to install the Ionide tools if they don't already have them installed

https://code.visualstudio.com/docs/editor/extension-gallery#_workspace-recommended-extensions

[isaacabraham]

This is an excellent idea. We should include:

Must Have

• Ionide itself.

Should Have

• Paket?
• C# Debugger (needed for F# debugging!)
• Chrome Debugger?

Could Have

• Azure Resource Manager?
• Azure Functions?
• FAKE?

Thoughts?

[theimowski]

• C# for debugging server side
• EditorConfig - we include .editorconfig file in template

[isaacabraham]

@theimowski What's EditorConfig for?

[theimowski]

https://editorconfig.org/ - basically takes all the burden related to formatting whitespace from programmer to editor, I use it all the time, works perfectly.