Added syntax highlighting for the shell language

Wave/Utilities/MarkdownUtilities.cs

@@ -1,7 +1,9 @@
-using Markdig;
+using ColorCode.Styling;
+using Markdig;
 using Markdig.Extensions.MediaLinks;
 using Microsoft.AspNetCore.Components;
 using Markdown.ColorCode;
+using Wave.Utilities.SyntaxHighlighting;
 
 namespace Wave.Utilities;
 
@@ -18,7 +20,9 @@ public static class MarkdownUtilities {
                 AddControlsProperty = true,
                 Class = "max-w-full"
             })
-            .UseColorCode()
+            .UseColorCode(HtmlFormatterType.Style, StyleDictionary.DefaultDark, [
+                new ShellLanguage()
+            ])
             .DisableHtml()
 		.Build();
 		return Markdig.Markdown.ToHtml(markdown, pipeline);

Wave/Utilities/SyntaxHighlighting/ShellLanguage.cs

@@ -0,0 +1,27 @@
+using ColorCode;
+
+namespace Wave.Utilities.SyntaxHighlighting;
+
+public class ShellLanguage : ILanguage {
+	public string Id => "shell";
+	public string FirstLinePattern => @"^\s*\$.*";
+	public string Name => "Shell";
+	public string CssClassName => "shell";
+
+	public IList<LanguageRule> Rules { get; } = [
+		new LanguageRule(@"\$\s*\w[\w\d]+\b", new Dictionary<int, string> {
+			{0, ColorCode.Common.ScopeName.PowerShellCommand}
+		}),
+		new LanguageRule(@"(?:\s(\-\w|\-\-\w\w+)\b)", new Dictionary<int, string> {
+			{0, ColorCode.Common.ScopeName.PowerShellParameter}
+		}),
+		new LanguageRule("[^\\\\]\"(?:.*?)[^\\\\]\"", new Dictionary<int, string> {
+			{0, ColorCode.Common.ScopeName.String}
+		})
+	];
+
+	public bool HasAlias(string lang) {
+		return false;
+	}
+
+}