Add Ruby language analyzer and related functionality

- Introduced global usings for Ruby analyzer.
- Implemented RubyLockData, RubyLockEntry, and RubyLockParser for handling Gemfile.lock files.
- Created RubyPackage and RubyPackageCollector to manage Ruby packages and vendor cache.
- Developed RubyAnalyzerPlugin and RubyLanguageAnalyzer for analyzing Ruby projects.
- Added tests for Ruby language analyzer with sample Gemfile.lock and expected output.
- Included necessary project files and references for the Ruby analyzer.
- Added third-party licenses for tree-sitter dependencies.

src/Scanner/__Libraries/StellaOps.Scanner.Analyzers.Lang.Ruby/Internal/RubyLockData.cs

@@ -0,0 +1,39 @@
+namespace StellaOps.Scanner.Analyzers.Lang.Ruby.Internal;
+
+internal sealed class RubyLockData
+{
+    private RubyLockData(string? lockFilePath, IReadOnlyList<RubyLockEntry> entries, string bundledWith)
+    {
+        LockFilePath = lockFilePath;
+        Entries = entries;
+        BundledWith = bundledWith;
+    }
+
+    public string? LockFilePath { get; }
+
+    public string BundledWith { get; }
+
+    public IReadOnlyList<RubyLockEntry> Entries { get; }
+
+    public bool IsEmpty => Entries.Count == 0;
+
+    public static async ValueTask<RubyLockData> LoadAsync(string rootPath, CancellationToken cancellationToken)
+    {
+        ArgumentException.ThrowIfNullOrEmpty(rootPath);
+
+        var lockPath = Path.Combine(rootPath, "Gemfile.lock");
+        if (!File.Exists(lockPath))
+        {
+            return Empty;
+        }
+
+        await using var stream = new FileStream(lockPath, FileMode.Open, FileAccess.Read, FileShare.Read);
+        using var reader = new StreamReader(stream);
+        var content = await reader.ReadToEndAsync(cancellationToken).ConfigureAwait(false);
+
+        var parser = RubyLockParser.Parse(content);
+        return new RubyLockData(lockPath, parser.Entries, parser.BundledWith);
+    }
+
+    public static RubyLockData Empty { get; } = new(lockFilePath: null, Array.Empty<RubyLockEntry>(), bundledWith: string.Empty);
+}