updated filestructure and gitignore. uploading exam progress

Exam/IKT203Exam/Portfolio/SharedLib/TDoublyLinkedList.h

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+#ifndef TDOUBLYLINKEDLIST_H
+#define TDOUBLYLINKEDLIST_H
+#include <string>
+#include <utility>
+#include "SharedLib.h"
+
+
+
+class TDoublyLinkedList {
+
+private:
+    struct Node {
+        std::string line;
+        Node* next;
+        Node* prev;
+        explicit Node(std::string  text) : line(std::move(text)), next(nullptr), prev(nullptr) {}
+
+        void SetNext(Node* node)
+        {
+            this->next = node;
+        }
+        void SetPrev(Node* node)
+        {
+            this->prev = node;
+        }
+        [[nodiscard]] Node* GetPrev() const
+        {
+            return this->prev;
+        }
+        [[nodiscard]] Node* GetNext() const
+        {
+            return this->next;
+        }
+        [[nodiscard]] std::string GetLine() const
+        {
+            return line;
+        }
+
+    };
+
+    Node* head;
+    Node* tail;
+    int size;
+
+
+public:
+    TDoublyLinkedList() : head(nullptr), tail(nullptr), size(0) {}
+    ~TDoublyLinkedList() = default;
+
+    void Append(const std::string &line);
+    void Prepend(const std::string& line);
+    [[nodiscard]] Node* NavigateToNode(int index) const;
+    void Remove(int index);
+    [[nodiscard]] std::string GetAtIndex(int index) const;
+    void InsertAtIndex(int index, const std::string &line);
+    [[nodiscard]] int GetSize() const;
+};
+
+
+#endif //TDOUBLYLINKEDLIST_H