feat(cli): add --nologo flag to suppress the startup logo banner

Mirrors the well-known dotnet/MSBuild --nologo convention. Threaded
through Options -> ObfuscationNeeds and gated in both the CLI and
GlobalTool entry points (shared Modules cover both).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: sunnamed434

docs/source/usage/how-to-use.rst

@@ -42,6 +42,7 @@ Available options:
 - ``--obfuscation-file``: Custom obfuscation config file
 - ``-n, --output-name``: Custom output file name (default: same as input)
 - ``--no-watermark``: Turn off watermarking
+- ``--nologo``: Don't show the BitMono logo banner on startup (same idea as ``dotnet --nologo``)
 - ``--strong-name-key``: Path to strong name key (.snk) file for assembly signing
 
 Setup

src/BitMono.CLI/Modules/ObfuscationNeeds.cs

@@ -20,6 +20,8 @@ internal class ObfuscationNeeds
     public string? InspectMetadataPath { get; set; }
     // Set when the run is a standalone --encrypt-metadata step instead of an obfuscation. See #276.
     public string? EncryptMetadataPath { get; set; }
+    // CLI --nologo: suppress the ASCII banner on startup.
+    public bool NoLogo { get; set; }
 #pragma warning restore CS8618
 }
 

src/BitMono.CLI/Modules/Options.cs

@@ -34,6 +34,9 @@ internal class Options
     [Option("no-watermark", Required = false, HelpText = "Disable watermarking (overrides obfuscation.json setting).")]
     public bool NoWatermark { get; set; }
 
+    [Option("nologo", Required = false, HelpText = "Don't display the BitMono logo (ASCII banner) on startup. Mirrors the dotnet/MSBuild --nologo convention.")]
+    public bool NoLogo { get; set; }
+
     [Option("strong-name-key", Required = false, HelpText = "Path to strong name key (.snk) file for assembly signing.")]
     public string? StrongNameKey { get; set; }
 

src/BitMono.CLI/Modules/OptionsObfuscationNeedsFactory.cs

@@ -195,6 +195,8 @@ public OptionsObfuscationNeedsFactory(string[] args)
             };
         }
 
+        needs.NoLogo = options.NoLogo;
+
         Directory.CreateDirectory(needs.OutputPath);
         Directory.CreateDirectory(needs.ReferencesDirectoryName);
         return needs;

src/BitMono.CLI/Program.cs

@@ -69,7 +69,10 @@ private static async Task<int> Main(string[] args)
             logger.Information("File: {0}", needs.FileName);
             logger.Information("Dependencies (libs): {0}", string.Join(", ", needs.ReferencesDirectoryNames));
             logger.Information("Everything is seems to be ok, starting obfuscation..");
-            logger.Information(AsciiArt);
+            if (!needs.NoLogo)
+            {
+                logger.Information(AsciiArt);
+            }
 
             var info = new IncompleteFileInfo(needs.FileName, needs.ReferencesDirectoryNames, needs.OutputPath);
             var engine = new BitMonoStarter(serviceProvider);

src/BitMono.GlobalTool/Program.cs

@@ -57,7 +57,10 @@ private static async Task<int> Main(string[] args)
             logger.Information("File: {0}", needs.FileName);
             logger.Information("Dependencies (libs): {0}", string.Join(", ", needs.ReferencesDirectoryNames));
             logger.Information("Everything is seems to be ok, starting obfuscation..");
-            logger.Information(AsciiArt);
+            if (!needs.NoLogo)
+            {
+                logger.Information(AsciiArt);
+            }
 
             var info = new IncompleteFileInfo(needs.FileName, needs.ReferencesDirectoryNames, needs.OutputPath);
             var engine = new BitMonoStarter(serviceProvider);