refactored ast, started lexer

source/ast/BlockNode/Header.cpp

@@ -0,0 +1,14 @@
+#include "ast/BlockNode/Header.h"
+
+namespace ast {
+    NodeKind Header::getKind() const {
+        return NodeKind::Header;
+    }
+
+    void Header::repr(std::ostream &os, int indent = 0) const {
+        os << getIndent(indent) << toString(this->getKind()) << " level: " << this->level << '\n';
+        for (const std::unique_ptr<InlineNode> &child : this->children) {
+            child->repr(os, indent + 1);
+        }
+    }
+}