RaceManager class (#562)

* Create RaceManager.cpp

* Create RaceManager class for race lifecycle management

Added RaceManager class to manage race events lifecycle.

* Refactor World class and implement ClearWorld method

Refactor World class constructor and destructor. Implement ClearWorld method to delete all objects and reset state.

* Add RaceManager to World class

* Update ValidateString for editor mode checks

Refactor ValidateString to handle editor mode and empty strings.

* Update Text.cpp

* Add SetText method to Text class

* Document RunGarbageCollector function

Added documentation for the RunGarbageCollector function.

* Refactor Game.cpp by removing dead code

Removed unused ruleset handling and clean-up code.

* Update Game.h

* Remove CM_SpawnFromLevelProps call

* Update Text.cpp

* Update World.cpp

* Add Clean method to RaceManager class

* Update RaceManager.cpp

* Update World.cpp

* Update World.h

* Update World.cpp

src/engine/RaceManager.cpp

@@ -0,0 +1,77 @@
+#include "RaceManager.h"
+
+#include "AllActors.h"
+#include "World.h"
+#include "port/Game.h"
+#include "engine/editor/Editor.h"
+#include "engine/editor/SceneManager.h"
+
+extern "C" {
+#include "render_courses.h"
+}
+
+RaceManager::RaceManager(World& world) : WorldContext(world) {
+}
+
+void RaceManager::Load() {
+    if (WorldContext.CurrentCourse) {
+        WorldContext.CurrentCourse->Load();
+    }
+}
+
+void RaceManager::PreInit() {
+    // Ruleset options
+    if (CVarGetInteger("gDisableItemboxes", false) == true) {
+        gPlaceItemBoxes = false;
+    } else {
+        gPlaceItemBoxes = true;
+    }
+}
+
+void RaceManager::BeginPlay() {
+    auto course = WorldContext.CurrentCourse;
+
+    if (course) {
+        // Do not spawn finishline in credits or battle mode. And if bSpawnFinishline.
+        if ((gGamestate != CREDITS_SEQUENCE) && (gModeSelection != BATTLE)) {
+            if (course->bSpawnFinishline) {
+                if (course->FinishlineSpawnPoint.has_value()) {
+                    AFinishline::Spawn(course->FinishlineSpawnPoint.value(), IRotator(0, 0, 0));
+                } else {
+                    AFinishline::Spawn();
+                }
+            
+            }
+        }
+        gEditor.AddLight("Sun", nullptr, D_800DC610[1].l->l.dir);
+
+        course->BeginPlay();
+    }
+}
+
+void RaceManager::PostInit() {
+    // Ruleset options
+    if (CVarGetInteger("gAllThwompsAreMarty", false) == true) {
+        for (auto object : gWorldInstance.Objects) {
+            if (OThwomp* thwomp = dynamic_cast<OThwomp*>(object)) {
+                gObjectList[thwomp->_objectIndex].unk_0D5 = OThwomp::States::JAILED; // Sets all the thwomp behaviour flags to marty
+                thwomp->Behaviour = OThwomp::States::JAILED;
+            }
+        }
+    }
+
+    if (CVarGetInteger("gAllBombKartsChase", false) == true) {
+        for (auto object : gWorldInstance.Objects) {
+            if (OBombKart* kart = dynamic_cast<OBombKart*>(object)) {
+                kart->Behaviour = OBombKart::States::CHASE;
+            }
+        }
+    }
+
+    if (CVarGetInteger("gGoFish", false) == true) {
+        OTrophy::Spawn(FVector(0,0,0), OTrophy::TrophyType::GOLD, OTrophy::Behaviour::GO_FISH);
+    }
+}
+
+void RaceManager::Clean() {
+}