refactor(generator): make raw variable font download explicit opt-in flag

Agent-Logs-Url: https://github.com/MudBlazor/MudBlazor.Icons/sessions/3c0e8544-4165-4605-8415-d3c9d13179e5

Co-authored-by: danielchalmers <7112040+danielchalmers@users.noreply.github.com>

Author: Copilot

src/GoogleMaterialDesignIconsGenerator/Program.cs

@@ -20,9 +20,9 @@ public static async Task Main(string[] args)
 
         codeGenerator.GenerateCsFilesUsingRoslyn(iconType, groupedIcons, folder: outputFolder);
 
-        if (iconType == IconType.MaterialSymbols)
+        if (iconType == IconType.MaterialSymbols && ShouldDownloadRawVariableFonts(args))
         {
-            await client.DownloadMaterialSymbolsFontsAsync(Path.Combine(outputFolder, "wwwroot", "font")).ConfigureAwait(false);
+            await client.DownloadMaterialSymbolsVariableFontsAsync(Path.Combine(outputFolder, "wwwroot", "font")).ConfigureAwait(false);
         }
     }
 
@@ -69,8 +69,31 @@ private static bool TryGetIconTypeFromArgs(IReadOnlyList<string> args, out IconT
             return true;
         }
 
-        iconType = ParseIconType(args[0]);
-        return true;
+        foreach (var arg in args)
+        {
+            if (arg.StartsWith("-", StringComparison.Ordinal))
+            {
+                continue;
+            }
+
+            iconType = ParseIconType(arg);
+            return true;
+        }
+
+        return false;
+    }
+
+    private static bool ShouldDownloadRawVariableFonts(IReadOnlyList<string> args)
+    {
+        foreach (var arg in args)
+        {
+            if (arg.Equals("--download-raw-variable-fonts", StringComparison.OrdinalIgnoreCase))
+            {
+                return true;
+            }
+        }
+
+        return false;
     }
 
     private static IconType ParseIconType(string value)

src/GoogleMaterialDesignIconsGenerator/Service/IconHttpClientService.cs

@@ -48,23 +48,14 @@ public async Task<IconsMetadata> ParseIconsAsync()
     }
 
     /// <summary>
-    /// Downloads Material Symbols font files into <paramref name="destinationFolderPath"/>.
+    /// Downloads raw Material Symbols variable font files into <paramref name="destinationFolderPath"/>.
     /// </summary>
     /// <param name="destinationFolderPath">Destination folder for downloaded font files.</param>
-    /// <param name="includeRawVariableFonts">
-    /// When <see langword="true"/>, downloads raw variable fonts from the upstream repository.
-    /// When <see langword="false"/> (default), raw variable font downloads are skipped.
-    /// </param>
     /// <param name="cancellationToken">Token used to cancel download and file write operations.</param>
-    public async Task DownloadMaterialSymbolsFontsAsync(string destinationFolderPath, bool includeRawVariableFonts = false, CancellationToken cancellationToken = default)
+    public async Task DownloadMaterialSymbolsVariableFontsAsync(string destinationFolderPath, CancellationToken cancellationToken = default)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(destinationFolderPath);
 
-        if (!includeRawVariableFonts)
-        {
-            return;
-        }
-
         try
         {
             Directory.CreateDirectory(destinationFolderPath);