Add explicit PPI project writer

src/assets/ppi_header.h

@@ -8,6 +8,7 @@
 #include <cstdint>
 #include <span>
 #include <string>
+#include <string_view>
 #include <vector>
 
 namespace pp::assets {
@@ -136,6 +137,23 @@ struct PpiLayerMetadataConfig {
     bool visible = true;
 };
 
+struct PpiFrameConfig {
+    std::uint32_t duration_ms = 100;
+};
+
+struct PpiLayerConfig {
+    std::string_view name;
+    PpiLayerMetadataConfig metadata;
+    std::span<const PpiFrameConfig> frames;
+};
+
+struct PpiProjectConfig {
+    std::uint32_t width = 0;
+    std::uint32_t height = 0;
+    std::span<const PpiLayerConfig> layers;
+    std::span<const PpiDirtyFacePayloadConfig> dirty_faces;
+};
+
 struct PpiMinimalProjectConfig {
     std::uint32_t width = 0;
     std::uint32_t height = 0;
@@ -172,6 +190,9 @@ struct PpiMinimalProjectConfig {
 [[nodiscard]] pp::foundation::Result<PpiDecodedProjectImages> decode_ppi_project_images(
     std::span<const std::byte> bytes);
 
+[[nodiscard]] pp::foundation::Result<std::vector<std::byte>> create_ppi_project(
+    PpiProjectConfig config);
+
 [[nodiscard]] pp::foundation::Result<std::vector<std::byte>> create_minimal_ppi_project(
     PpiMinimalProjectConfig config);