Cleaned up project and added constraints for SQLAlchemy types in generate entity

MycroForge.CLI/Commands/Attributes/RequiresVenvAttribute.cs

@@ -0,0 +1,12 @@
+namespace MycroForge.CLI.Commands.Attributes;
+
+public class RequiresVenvAttribute : Attribute
+{
+    public string Path => System.IO.Path.Join(Environment.CurrentDirectory, ".venv");
+
+    public void RequireVenv(string command)
+    {
+        if (!File.Exists(System.IO.Path.Join(Environment.CurrentDirectory, Path)))
+            throw new($"Command '{command}' requires directory {Path}");
+    }
+}