Add metadata-only PPI save automation

src/assets/ppi_header.h

@@ -118,6 +118,13 @@ struct PpiDecodedProjectImages {
     std::vector<PpiDecodedFacePayload> faces;
 };
 
+struct PpiMinimalProjectConfig {
+    std::uint32_t width = 0;
+    std::uint32_t height = 0;
+    std::string layer_name;
+    std::uint32_t frame_duration_ms = 100;
+};
+
 [[nodiscard]] pp::foundation::Result<PpiHeaderInfo> parse_ppi_header(
     std::span<const std::byte> bytes) noexcept;
 
@@ -143,4 +150,7 @@ struct PpiDecodedProjectImages {
 [[nodiscard]] pp::foundation::Result<PpiDecodedProjectImages> decode_ppi_project_images(
     std::span<const std::byte> bytes);
 
+[[nodiscard]] pp::foundation::Result<std::vector<std::byte>> create_minimal_ppi_project(
+    PpiMinimalProjectConfig config);
+
 }