Refactor Compiler Pipeline: Decouple Scope Layout from Runtime Descriptor

- **Architecture:** Split `IScopeDescriptor` into `IScopeLayout` (Binder/Structure) and immutable `IScopeDescriptor` (Runtime/Types).
- **Binder:** Now produces `IScopeLayout` via `IScopeBuilder`. Restored Upvalue tracking and Lambda nesting detection.
- **TypeChecker:** Introduced `TTypeContext` to track types during traversal. Now produces the final `IScopeDescriptor`.
- **Evaluator:** Adapted to new `ILambdaExpressionNode` structure.
- **Fixes:** Resolved `Scope depth mismatch` in TypeChecker and `AccessViolation` in Evaluator due to lost parent scopes.

ASTPlayground/ASTPlayground.dpr

@@ -5,11 +5,9 @@ uses
     System.StartUpCopy,
     FMX.Forms,
     MainForm in 'MainForm.pas' {Form1},
-    Myc.Ast.Evaluator in '..\Src\AST\Myc.Ast.Evaluator.pas',
     Myc.Ast.Nodes in '..\Src\AST\Myc.Ast.Nodes.pas',
     Myc.Ast.Scope in '..\Src\AST\Myc.Ast.Scope.pas',
     Myc.Data.Value in 'Myc.Data.Value.pas',
-    Myc.Ast.Debugger in '..\Src\AST\Myc.Ast.Debugger.pas',
     Myc.Ast.Visitor in '..\Src\AST\Myc.Ast.Visitor.pas',
     Myc.Ast.RTL in '..\Src\AST\Myc.Ast.RTL.pas',
     Myc.Ast.Dumper in '..\Src\AST\Myc.Ast.Dumper.pas',
@@ -26,8 +24,9 @@ uses
     Myc.Ast.Compiler.Lowering in '..\Src\AST\Myc.Ast.Compiler.Lowering.pas',
     Myc.Ast.Compiler.TypeChecker in '..\Src\AST\Myc.Ast.Compiler.TypeChecker.pas',
     Myc.Ast.Compiler.Macros in '..\Src\AST\Myc.Ast.Compiler.Macros.pas',
+    Myc.Ast.Compiler.Specializer in '..\Src\AST\Myc.Ast.Compiler.Specializer.pas',
     Myc.Ast.Environment in '..\Src\AST\Myc.Ast.Environment.pas',
-    Myc.Ast.Compiler.Specializer in '..\Src\AST\Myc.Ast.Compiler.Specializer.pas';
+    Myc.Ast.Debugger in '..\Src\AST\Myc.Ast.Debugger.pas';
 
 {$R *.res}