Added PPM writer

src/image_writers/PpmImage.hpp

@@ -0,0 +1,23 @@
+#ifndef PPM_IMAGE_HPP
+#define PPM_IMAGE_HPP
+
+#include "Image.hpp"
+#include <cstdint>
+#include <vector>
+
+namespace image_writers {
+
+class PpmImage : public Image {
+public:
+  PpmImage(const std::vector<std::vector<std::uint8_t>> &imageData);
+  ~PpmImage() = default;
+
+  bool writeToFile(const std::filesystem::path &filePath) override;
+
+private:
+  const std::vector<std::vector<std::uint8_t>> &imageData_;
+};
+
+} // namespace image_writers
+
+#endif