feat: implement for-loops with proper scope management

- Add support for C-style for loops: for (init; condition; increment) { body }
- Implement three-level scoping: loop context + per-iteration contexts
- Add semicolon disabler for increment statements using RAII guards
- Support break/continue/return control flow with scope validation
- Fix semicolon handling in parser for flexible for-loop syntax

include/Ast/ForSt.hpp

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <Ast/astBase.hpp>
+
+namespace Fig::Ast
+{
+    class ForSt final : public StatementAst
+    {
+    public:
+        Statement initSt;
+        Expression condition;
+        Statement incrementSt;
+        BlockStatement body;
+
+        ForSt()
+        {
+            type = AstType::ForSt;
+        }
+        ForSt(Statement _initSt, Expression _condition, Statement _incrementSt, BlockStatement _body) :
+            initSt(std::move(_initSt)),
+            condition(std::move(_condition)),
+            incrementSt(std::move(_incrementSt)),
+            body(std::move(_body))
+        {
+            type = AstType::ForSt;
+        }
+    };
+
+    using For = std::shared_ptr<ForSt>; 
+};

include/Ast/astBase.hpp

@@ -47,6 +47,7 @@ namespace Fig::Ast
 
         VarAssignSt,
         WhileSt,
+        ForSt,
         ReturnSt,
         BreakSt,
         ContinueSt,