add post-effect-slot resource & add gfx.posteffects library

src/content/Content.hpp

@@ -189,6 +189,8 @@ constexpr const char* to_string(ResourceType type) {
     switch (type) {
         case ResourceType::CAMERA:
             return "camera";
+        case ResourceType::POST_EFFECT_SLOT:
+            return "post-effect-slot";
         default:
             return "unknown";
     }
@@ -197,6 +199,8 @@ constexpr const char* to_string(ResourceType type) {
 inline std::optional<ResourceType> ResourceType_from(std::string_view str) {
     if (str == "camera") {
         return ResourceType::CAMERA;
+    } else if (str == "post-effect-slot") {
+        return ResourceType::POST_EFFECT_SLOT;
     }
     return std::nullopt;
 }

src/content/content_fwd.hpp

@@ -7,7 +7,11 @@ class ContentPackRuntime;
 
 enum class ContentType { NONE, BLOCK, ITEM, ENTITY, GENERATOR };
 
-enum class ResourceType : size_t { CAMERA, LAST = CAMERA };
+enum class ResourceType : size_t {
+    CAMERA,
+    POST_EFFECT_SLOT,
+    LAST = POST_EFFECT_SLOT
+};
 
 inline constexpr auto RESOURCE_TYPES_COUNT =
     static_cast<size_t>(ResourceType::LAST) + 1;