create typescript playground in nx workspace

tsplay.sh

tsplay () {
	local app="$1" 
	local workspace="${2:-default}" 
	local default_root="$HOME/tsplay" 
	local work_root="${TSPLAY_ROOT:-$default_root}" 
	local workspace_dir="$work_root/$workspace" 
	local lsws="$(ls -1 "$work_root"|sort|sed 's/^/  /')" 
	local usage="Usage: tsplay -a <app> [-w <workspace>]\n" 
	usage+="Existing workspaces:\n" 
	usage+="$lsws" 
	if [[ -z ${app-} ]]
	then
		echo "$usage"
		echo "an app is required"
		return 1
	fi
	mkdir -p "$work_root"
	cd "$work_root"
	if [[ -d $workspace_dir ]]
	then
		echo "Workspace already exists: $workspace"
	else
		echo "Creating new workspace: $workspace"
		npx create-nx-workspace@latest --preset=ts --nxCloud=no --name="$workspace"
	fi
	cd "$workspace_dir"
	if [[ -d "$workspace_dir/packages/$app" ]]
	then
		echo "App already exists: $app"
	else
		echo "Creating app in $workspace workspace: $app"
		npm install --save @nrwl/node
		npx nx generate @nrwl/node:application "$app" --tags=type:app
	fi
	echo "Workspace directory: $workspace_dir"
}