add new world events: on_block_broken, on_block_placed

src/content/ContentLoader.cpp

@@ -34,6 +34,7 @@ ContentLoader::ContentLoader(ContentPack* pack, ContentBuilder& builder)
     );
     stats = &runtime->getStatsWriteable();
     env = runtime->getEnvironment();
+    this->runtime = runtime.get();
     builder.add(std::move(runtime));
 }
 
@@ -408,7 +409,7 @@ void ContentLoader::load() {
 
     fs::path scriptFile = folder/fs::path("scripts/world.lua");
     if (fs::is_regular_file(scriptFile)) {
-        scripting::load_world_script(env, pack->id, scriptFile);
+        scripting::load_world_script(env, pack->id, scriptFile, runtime->worldfuncsset);
     }
 
     if (!fs::is_regular_file(pack->getContentFile()))

src/content/ContentLoader.hpp

@@ -14,7 +14,9 @@ struct BlockMaterial;
 struct ItemDef;
 struct EntityDef;
 struct ContentPack;
+
 class ContentBuilder;
+class ContentPackRuntime;
 struct ContentPackStats;
 
 namespace dynamic {
@@ -24,6 +26,7 @@ namespace dynamic {
 
 class ContentLoader {
     const ContentPack* pack;
+    ContentPackRuntime* runtime;
     scriptenv env;
     ContentBuilder& builder;
     ContentPackStats* stats;

src/content/ContentPack.hpp

@@ -80,11 +80,18 @@ struct ContentPackStats {
     }
 };
 
+struct world_funcs_set {
+    bool onblockplaced : 1;
+    bool onblockbroken : 1;
+};
+
 class ContentPackRuntime {
     ContentPack info;
     ContentPackStats stats {};
     scriptenv env;
 public:
+    world_funcs_set worldfuncsset {};
+
     ContentPackRuntime(
         ContentPack info,
         scriptenv env