Implement a dynamic array (also known as a resizable array) with the following operations: add(element), get(index), set(index, element), and size(). The array should automatically increase its capacity when it is full.

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Dynamic arrays allow for flexible resizing and efficient memory management for storing strings.

Dynamic arrays can grow and shrink in size as needed, unlike static arrays.
Example: In C++, use 'std::vector' for dynamic string arrays.
Memory allocation is handled automatically, reducing the risk of overflow.
Resizing typically involves creating a new array and copying elements over.
Example: In Python, lists are dynamic arrays that can hold strings and resize automatically.

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Implement a dynamic array (also known as a resizable array) with the following operations: add(element), get(index), set(index, element), and size(). The array should automatically increase its capacity when it is full.

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