Added write-headline.ps1

scripts/write-headline.ps1

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+<#
+.SYNOPSIS
+	Writes text as headline
+.DESCRIPTION
+	This PowerShell script writes the given text as a headline.
+.PARAMETER text
+	Specifies the headline text
+.EXAMPLE
+	PS> ./write-headline.ps1 "Hello World"
+
+	* Hello World *
+	---------------
+.LINK
+	https://github.com/fleschutz/PowerShell
+.NOTES
+	Author: Markus Fleschutz | License: CC0
+#>
+
+param([string]$text = "")
+try {
+	if ($text -eq "") { $text = Read-Host "Enter the headline text" }
+
+	Write-Host "`n* $text *" -foregroundColor green
+	[int]$len = $text.Length
+	[string]$line = "----"
+	for ([int]$i = 0; $i -lt $len; $i++) { $line += "-" }
+	Write-Host "$line" -foregroundColor green
+	exit 0 # success
+} catch {
+	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}