refactor(block): migrate block data to JSON and resource locations

Replace TOML block definitions with JSON files loaded from asset locations. Block names are now ResourceLocation keys, IDs are resolved from registry.json, and reusable JSON parsing helpers were added.

src/tools/json_utils.cpp

@@ -1,15 +1,20 @@
 #include "Cubed/tools/json_utils.hpp"
 
+#include "Cubed/tools/log.hpp"
+
+#include <fstream>
 #include <rapidjson/document.h>
+#include <rapidjson/istreamwrapper.h>
 #include <rapidjson/stringbuffer.h>
 #include <rapidjson/writer.h>
 #include <string>
 #include <unordered_map>
-namespace Tools {
+namespace Cubed::Tools {
 
 using rapidjson::Document;
+using rapidjson::IStreamWrapper;
 using rapidjson::Value;
-
+namespace fs = std::filesystem;
 namespace {
 std::string serialize_value(const Value& v, rapidjson::StringBuffer& buf) {
     rapidjson::Writer<rapidjson::StringBuffer> w(buf);
@@ -51,4 +56,23 @@ std::unordered_map<std::string, std::string> doc_to_map(const Document& doc) {
     }
     return m;
 }
-} // namespace Tools
+
+bool parse_json(rapidjson::Document& doc, const std::filesystem::path& path) {
+
+    std::ifstream file{path};
+    if (!file.is_open()) {
+        Logger::error("Can't parse json {}", path.string());
+        return false;
+    }
+    IStreamWrapper isw{file};
+    doc.ParseStream(isw);
+    if (doc.HasParseError()) {
+        auto code = doc.GetParseError();
+        Logger::error("Parse {} failed, error code {}", path.string(),
+                      static_cast<int>(code));
+        return false;
+    }
+    return true;
+}
+
+} // namespace Cubed::Tools