Lint: rename públicos al inglés + refactor cognitive-complexity + unused-includes

Identifier-naming: rename de métodos públicos y cross-file al inglés
(camelBack), traducción de campos y locales en el proceso (TitleShip,
StageManager, SpawnController, ShipAnimator, helpers de PlayArea, etc.).

Refactor por cognitive-complexity (>25): GameScene::draw (59→3) con 9
helpers de estado, PhysicsWorld::resolveBodyCollisions (35→5) extrayendo
resolveBodyPair, Options::load{Window,Physics,Audio}ConfigFromYaml
(32/49/57→5/2/3) con templates readField, TitleScene::update (68→4) con
5 sub-pasos por estado + handleSkipInput/handleStartInput +
triggerExitForJoinedPlayers, DebrisManager::explode (39→3) con
extractSegments/spawnDebris/applyAngularVelocity/applyVisualRotation.

use-anyofallof: bucles → std::ranges::any_of/all_of en Input,
ShipAnimator y SpawnController.

readability-static-accessed-through-instance: Director::run y
VectorText::getTextWidth/Height invocados por clase.

readability-convert-member-functions-to-static: ResourcePack::decryptData.

unused-includes: eliminación de <utility>, <cstdint>, <vector>,
<iostream>, defaults.hpp y otros no usados directamente en headers y
unidades de traducción. Restablecido core/defaults.hpp en title_scene.cpp
(falsa "unused" del header).

Bug fix: eliminado isActive() duplicado en Bullet (redeclaración tras
rename de esta_activa→isActive que chocaba con el override de Entity).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

source/core/utils/path_utils.cpp

@@ -10,39 +10,39 @@
 namespace Utils {
 
 // Variables globals per guardar argv[0]
-static std::string executable_path_;
-static std::string executable_directory_;
+static std::string executable_path;
+static std::string executable_directory;
 
 // Inicialitzar el sistema de rutes con argv[0]
 void initializePathSystem(const char* argv0) {
     if (argv0 == nullptr) {
         std::cerr << "[PathUtils] ADVERTÈNCIA: argv[0] es nullptr\n";
-        executable_path_ = "";
-        executable_directory_ = ".";
+        executable_path = "";
+        executable_directory = ".";
         return;
     }
 
-    executable_path_ = argv0;
+    executable_path = argv0;
 
     // Extreure el directori
     std::filesystem::path path(argv0);
-    executable_directory_ = path.parent_path().string();
+    executable_directory = path.parent_path().string();
 
-    if (executable_directory_.empty()) {
-        executable_directory_ = ".";
+    if (executable_directory.empty()) {
+        executable_directory = ".";
     }
 
-    std::cout << "[PathUtils] Executable: " << executable_path_ << "\n";
-    std::cout << "[PathUtils] Directori: " << executable_directory_ << "\n";
+    std::cout << "[PathUtils] Executable: " << executable_path << "\n";
+    std::cout << "[PathUtils] Directori: " << executable_directory << "\n";
 }
 
 // Obtenir el directori de l'executable
 auto getExecutableDirectory() -> std::string {
-    if (executable_directory_.empty()) {
+    if (executable_directory.empty()) {
         std::cerr << "[PathUtils] ADVERTÈNCIA: Sistema de rutes no inicialitzat\n";
         return ".";
     }
-    return executable_directory_;
+    return executable_directory;
 }
 
 // Detectar si estem dins un bundle de macOS