Add a devcontainer settings for the repos

[MariusStorhaug]

• PowerShell modules
• Actions
• FunctionApps

Example

{
	"name": "PnP PowerShell",	
	"image": "mcr.microsoft.com/devcontainers/dotnet:0-6.0",	
	"features": {		
		"ghcr.io/devcontainers/features/git:1": {
			"ppa": true,
			"version": "os-provided"
		},
		"ghcr.io/devcontainers/features/powershell:1": {
			"version": "latest"
		}		
	},
	"workspaceFolder": "/workspaces/powershell",
	"postCreateCommand": "bash ./build/postCreateCommand.sh",		
	"customizations": {
		"vscode": {
			"settings": {
				"terminal.integrated.defaultProfile.linux": "pwsh"
			},
			"extensions": [				
				"ms-vscode.powershell",
				"ms-dotnettools.csdevkit",
				"ms-vsliveshare.vsliveshare",				
				"shd101wyy.markdown-preview-enhanced",
				"GitHub.copilot",
				"GitHub.copilot-chat",
				"eamodio.gitlens",
				"github.vscode-pull-request-github"
			]
		}
	},	
	"remoteUser": "root",
	"shutdownAction": "stopCompose"
}