Add skill configure-telerik-nuget

Author: LanceMcCarthy

.github/skills/configure-telerik-nuget/SKILL.md

@@ -0,0 +1,42 @@
+---
+name: configure-telerik-nuget
+description: Helps setup, configure and manage Telerik NuGet feeds in your repo's nuget.config file.
+---
+
+Use these helper functions to manage Telerik NuGet source configuration.
+
+Get a new api key at https://www.telerik.com/account/downloads/api-keys
+
+## Function: configure
+
+Adds the Telerik feed when missing, or updates credentials/source settings when the same source URL already exists.
+
+```powershell
+function Configure-TelerikNuGetSource {
+	param(
+		[Parameter(Mandatory = $true)]
+		[string]$ApiKey,
+
+		[string]$SourceName = "Telerik_NuGet_Server",
+		[string]$SourceUrl = "https://nuget.telerik.com/v3/index.json"
+	)
+
+	$existingSourcesOutput = dotnet nuget list source | Out-String
+
+	if ($existingSourcesOutput -match [regex]::Escape($SourceUrl)) {
+		dotnet nuget update source "$SourceName" --source "$SourceUrl" --username "api-key" --password "$ApiKey" --store-password-in-clear-text
+		Write-Host "A NuGet package source with URL '$SourceUrl' already exists. Updated source '$SourceName'."
+		return
+	}
+
+	dotnet nuget source add --name "$SourceName" --source "$SourceUrl" --username "api-key" --password "$ApiKey" --store-password-in-clear-text
+
+	Write-Host "Added Telerik NuGet source '$SourceName' at '$SourceUrl'."
+}
+```
+
+Example usage:
+
+```powershell
+Configure-TelerikNuGetSource -ApiKey "<telerik-api-key>"
+```