Improved dev experience & allow native .NET debugging (#460)

app/MindWork AI Studio/Tools/EnvFile.cs

@@ -0,0 +1,41 @@
+#if DEBUG
+using System.Text;
+
+namespace AIStudio.Tools;
+
+/// <summary>
+/// Read environment variables for the application from an .env file.
+/// </summary>
+/// <remarks>
+/// We consider this feature a security issue. Therefore, it is only
+/// available in DEBUG mode. To ensure this, we remove the code
+/// from any release build.
+/// </remarks>
+public static class EnvFile
+{
+    public static async Task Apply(string filePath)
+    {
+        if(!File.Exists(filePath))
+        {
+            Console.WriteLine($"Error: The .env file '{filePath}' does not exist.");
+            return;
+        }
+        
+        var lines = await File.ReadAllLinesAsync(filePath, Encoding.UTF8);
+        foreach (var line in lines)
+        {
+            if (string.IsNullOrWhiteSpace(line) || line.Trim().StartsWith('#'))
+                continue;
+
+            var parts = line.Split(['='], 2);
+            if (parts.Length != 2)
+                continue;
+
+            var key = parts[0].Trim();
+            var value = parts[1].Trim();
+
+            Environment.SetEnvironmentVariable(key, value);
+        }
+    }
+}
+#endif