Add install-github-cli.ps1

Scripts/install-github-cli.ps1

@@ -0,0 +1,33 @@
+<#
+.SYNOPSIS
+	install-github-cli.ps1 
+.DESCRIPTION
+	Installs GitHub CLI
+.EXAMPLE
+	PS> .\install-github-cli.ps1 
+.LINK
+	https://github.com/fleschutz/PowerShell
+.NOTES
+	Author:  Markus Fleschutz
+	License: CC0
+#>
+
+try {
+	$StopWatch = [system.diagnostics.stopwatch]::startNew()
+
+	if ($IsMacOS) {
+		brew install gh
+	} elseif ($IsLinux) {
+		curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg | sudo gpg --dearmor -o /usr/share/keyrings/githubcli-archive-keyring.gpg
+		echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | sudo tee /etc/apt/sources.list.d/github-cli.list > /dev/null
+		sudo apt update
+		sudo apt install gh
+	}
+
+	[int]$Elapsed = $StopWatch.Elapsed.TotalSeconds
+	"✔️ installed GitHub CLI in $Elapsed sec"
+	exit 0
+} catch {
+	write-error "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}