add compile & test worker

src/LiquidCode.Tester.Worker/Services/OutputCheckerService.cs

@@ -0,0 +1,54 @@
+namespace LiquidCode.Tester.Worker.Services;
+
+public class OutputCheckerService : IOutputCheckerService
+{
+    private readonly ILogger<OutputCheckerService> _logger;
+
+    public OutputCheckerService(ILogger<OutputCheckerService> logger)
+    {
+        _logger = logger;
+    }
+
+    public async Task<bool> CheckOutputAsync(string actualOutput, string expectedOutputPath)
+    {
+        try
+        {
+            var expectedOutput = await File.ReadAllTextAsync(expectedOutputPath);
+
+            // Normalize outputs for comparison
+            var normalizedActual = NormalizeOutput(actualOutput);
+            var normalizedExpected = NormalizeOutput(expectedOutput);
+
+            var match = normalizedActual == normalizedExpected;
+
+            if (!match)
+            {
+                _logger.LogDebug("Output mismatch. Expected length: {ExpectedLength}, Actual length: {ActualLength}",
+                    normalizedExpected.Length, normalizedActual.Length);
+            }
+
+            return match;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error checking output against {ExpectedFile}", expectedOutputPath);
+            return false;
+        }
+    }
+
+    private string NormalizeOutput(string output)
+    {
+        // Remove trailing whitespace from each line and normalize line endings
+        var lines = output.Split(new[] { "\r\n", "\r", "\n" }, StringSplitOptions.None)
+            .Select(line => line.TrimEnd())
+            .ToList();
+
+        // Remove trailing empty lines
+        while (lines.Count > 0 && string.IsNullOrWhiteSpace(lines[^1]))
+        {
+            lines.RemoveAt(lines.Count - 1);
+        }
+
+        return string.Join("\n", lines);
+    }
+}