Add scripts for resolving and verifying Chromium binary paths

- Implemented `chrome-path.js` to define functions for locating Chromium binaries across different platforms and nested directories.
- Added `verify-chromium.js` to check for the presence of the Chromium binary and log the results, including candidate paths checked.
- The scripts support Linux, Windows, and macOS environments, enhancing the flexibility of Chromium binary detection.

src/StellaOps.Scanner.Analyzers.Lang/Plugin/LanguageAnalyzerPluginCatalog.cs

@@ -0,0 +1,147 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Reflection;
+using Microsoft.Extensions.Logging;
+using StellaOps.Plugin;
+using StellaOps.Plugin.Hosting;
+using StellaOps.Scanner.Core.Security;
+
+namespace StellaOps.Scanner.Analyzers.Lang.Plugin;
+
+public interface ILanguageAnalyzerPluginCatalog
+{
+    IReadOnlyCollection<ILanguageAnalyzerPlugin> Plugins { get; }
+
+    void LoadFromDirectory(string directory, bool seal = true);
+
+    IReadOnlyList<ILanguageAnalyzer> CreateAnalyzers(IServiceProvider services);
+}
+
+public sealed class LanguageAnalyzerPluginCatalog : ILanguageAnalyzerPluginCatalog
+{
+    private readonly ILogger<LanguageAnalyzerPluginCatalog> _logger;
+    private readonly IPluginCatalogGuard _guard;
+    private readonly ConcurrentDictionary<string, Assembly> _assemblies = new(StringComparer.OrdinalIgnoreCase);
+    private IReadOnlyList<ILanguageAnalyzerPlugin> _plugins = Array.Empty<ILanguageAnalyzerPlugin>();
+
+    public LanguageAnalyzerPluginCatalog(IPluginCatalogGuard guard, ILogger<LanguageAnalyzerPluginCatalog> logger)
+    {
+        _guard = guard ?? throw new ArgumentNullException(nameof(guard));
+        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
+    }
+
+    public IReadOnlyCollection<ILanguageAnalyzerPlugin> Plugins => _plugins;
+
+    public void LoadFromDirectory(string directory, bool seal = true)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(directory);
+        var fullDirectory = Path.GetFullPath(directory);
+
+        var options = new PluginHostOptions
+        {
+            PluginsDirectory = fullDirectory,
+            EnsureDirectoryExists = false,
+            RecursiveSearch = false,
+        };
+        options.SearchPatterns.Add("StellaOps.Scanner.Analyzers.*.dll");
+
+        var result = PluginHost.LoadPlugins(options, _logger);
+        if (result.Plugins.Count == 0)
+        {
+            _logger.LogWarning("No language analyzer plug-ins discovered under '{Directory}'.", fullDirectory);
+        }
+
+        foreach (var descriptor in result.Plugins)
+        {
+            try
+            {
+                _guard.EnsureRegistrationAllowed(descriptor.AssemblyPath);
+                _assemblies[descriptor.AssemblyPath] = descriptor.Assembly;
+                _logger.LogInformation(
+                    "Registered language analyzer plug-in assembly '{Assembly}' from '{Path}'.",
+                    descriptor.Assembly.FullName,
+                    descriptor.AssemblyPath);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Failed to register language analyzer plug-in '{Path}'.", descriptor.AssemblyPath);
+            }
+        }
+
+        RefreshPluginList();
+
+        if (seal)
+        {
+            _guard.Seal();
+        }
+    }
+
+    public IReadOnlyList<ILanguageAnalyzer> CreateAnalyzers(IServiceProvider services)
+    {
+        ArgumentNullException.ThrowIfNull(services);
+
+        if (_plugins.Count == 0)
+        {
+            _logger.LogWarning("No language analyzer plug-ins available; skipping language analysis.");
+            return Array.Empty<ILanguageAnalyzer>();
+        }
+
+        var analyzers = new List<ILanguageAnalyzer>(_plugins.Count);
+
+        foreach (var plugin in _plugins)
+        {
+            if (!IsPluginAvailable(plugin, services))
+            {
+                continue;
+            }
+
+            try
+            {
+                var analyzer = plugin.CreateAnalyzer(services);
+                if (analyzer is null)
+                {
+                    continue;
+                }
+
+                analyzers.Add(analyzer);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Language analyzer plug-in '{Plugin}' failed to create analyzer instance.", plugin.Name);
+            }
+        }
+
+        if (analyzers.Count == 0)
+        {
+            _logger.LogWarning("All language analyzer plug-ins were unavailable.");
+            return Array.Empty<ILanguageAnalyzer>();
+        }
+
+        analyzers.Sort(static (a, b) => string.CompareOrdinal(a.Id, b.Id));
+        return new ReadOnlyCollection<ILanguageAnalyzer>(analyzers);
+    }
+
+    private void RefreshPluginList()
+    {
+        var assemblies = _assemblies.Values.ToArray();
+        var plugins = PluginLoader.LoadPlugins<ILanguageAnalyzerPlugin>(assemblies);
+        _plugins = plugins is IReadOnlyList<ILanguageAnalyzerPlugin> list
+            ? list
+            : new ReadOnlyCollection<ILanguageAnalyzerPlugin>(plugins.ToArray());
+    }
+
+    private static bool IsPluginAvailable(ILanguageAnalyzerPlugin plugin, IServiceProvider services)
+    {
+        try
+        {
+            return plugin.IsAvailable(services);
+        }
+        catch
+        {
+            return false;
+        }
+    }
+}