Add documentation for dotnet package download command

docs/core/tools/dotnet-package-download.md

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+---
+title: dotnet package download command
+description: Download a nuget package.
+author: Nigusu-Allehu
+ms.date: 11/06/2025
+---
+# dotnet package download
+
+> Applies to: ✔️ .NET 10 SDK and later versions.
+
+## Name
+
+`dotnet package download` — Download one or more NuGet packages to disk.
+
+## Synopsis
+
+```
+dotnet package download [<packages>...]
+    [--output <path>]
+    [--configfile <path> ]
+    [--include-transitive]
+    [--source <package source>]
+    [--allow-insecure-connections]
+    [--interactive]
+    [--verbosity <level>]
+
+dotnet package download -h|--help
+```
+
+## Description
+
+`dotnet package download` donwloads NuGet packages to a local directory. It **does not** add or update `PackageReference` entries in project files and **does not** build or restore a project. 
+By default, the command downloads only the packages you specify (no transitive dependencies) to the current working directory.
+
+## Arguments
+
+* **`packages`**
+  One or more package IDs to download.
+  Each package can optionally include a version with `@`.
+  If a package version is not specified the latest version of the package is downloaded.
+  For example, dotnet package update Contoso.Utilities or dotnet package update [email protected].
+
+## Options
+
+* **`--allow-insecure-connections`**
+
+     Allows downloading from HTTP sources. Without this flag, insecure sources cause the command to error per [HTTPS-everywhere](https://aka.ms/nuget-https-everywhere) guidance.
+
+* **`--configfile <path>`**
+
+     Path to a NuGet.config to use.
+
+* **`--interactive`**
+
+     Enables interactive authentication if required.
+
+* **`-o, --output <path>`**
+
+     Directory where the package will be placed. Defaults to the current working directory.
+
+* **`--prerelease`**
+
+     Allows downloading prerelease versions.
+
+* **`-s --source <package source>`**
+
+     Specifies the NuGet package source to use.
+
+* **`-v --verbosity <level>`**
+
+     Set the verbosity level of the command Allowed values are q[uiet], m[inimal], n[ormal], d[etailed], and diag[nostic].
+
+[!INCLUDE [help](../../../includes/cli-help.md)]
+
+## Examples
+
+### Download a single package at a specific version
+
+```ps1
+dotnet package download [email protected] --output My/Destination/For/packages
+```
+
+### Download multiple packages to a custom folder
+
+```ps1
+dotnet package download [email protected] [email protected] --output My/Destination/For/packages
+```
+
+### Download including transitive dependencies
+
+```ps1
+dotnet package download Azure.Storage.Blobs --include-transitive --output ./cache
+```