Finished compile time plugin loading. Refactored plugin loading. Extended build helper script

Resources/Scripts/Helpers/StartupClassDetector.cs

@@ -0,0 +1,46 @@
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+
+namespace Scripts.Helpers;
+
+public class StartupClassDetector
+{
+    public bool Check(string content, out string fullName)
+    {
+        var tree = CSharpSyntaxTree.ParseText(content);
+        var root = tree.GetCompilationUnitRoot();
+        
+        var mscorlib = MetadataReference.CreateFromFile(typeof(object).Assembly.Location);
+        var compilation = CSharpCompilation.Create("MyAnalysis", [tree], [mscorlib]);
+
+        var model = compilation.GetSemanticModel(tree);
+
+        var classDeclarations = root.DescendantNodes().OfType<ClassDeclarationSyntax>();
+
+        foreach (var classDecl in classDeclarations)
+        {
+            var symbol = model.GetDeclaredSymbol(classDecl);
+            
+            if(symbol == null)
+                continue;
+            
+            var hasAttribute = symbol.GetAttributes().Any(attribute =>
+            {
+                if (attribute.AttributeClass == null)
+                    return false;
+
+                return attribute.AttributeClass.Name.Contains("PluginStartup");
+            });
+
+            if (hasAttribute)
+            {
+                fullName = symbol.ContainingNamespace.ToDisplayString() + "." + classDecl.Identifier.ValueText;
+                return true;
+            }
+        }
+
+        fullName = "";
+        return false;
+    }
+}