refactor(log): migra els subsistemes restants i elimina iostream

Acaba la migració dels std::cout/cerr a Log::*:

- core/locale, core/ui/ui_config, core/rendering/{screen,text,gif,
  surface, sprite/animated_sprite, sdl3gpu/*}.
- game/{options, debug_config, editor/editor_config, levels/level_manager,
  map/{map,tilemap,paint_layer}, entities/entity_manager_loadlevel}.

Severitats coherents: warns per a configs absents amb fallback,
errors per a YAML malformat o E/S fallida, infos per a estats.

Resultat:
- 0 occurrences de std::cout/std::cerr a source/.
- Cap #include <iostream> orfà (eliminat de surface.cpp).
- Output funcional idèntic al històric; AEE_LOG filtra (ex.
  `AEE_LOG=warn` només mostra warnings, `AEE_LOG=*:warn,Tag:info`
  combina globals i overrides).

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

source/core/rendering/sdl3gpu/pipelines/crtpi_pipeline.cpp

@@ -1,10 +1,10 @@
 #include "core/rendering/sdl3gpu/pipelines/crtpi_pipeline.hpp"
 
 #include <cstring>
-#include <iostream>
 
 #include "core/rendering/sdl3gpu/shader_factory.hpp"
 #include "core/rendering/sdl3gpu/viewport.hpp"
+#include "utils/log.hpp"
 
 #ifdef __APPLE__
 #include "core/rendering/sdl3gpu/msl/crtpi_frag.msl.h"
@@ -29,7 +29,7 @@ namespace Rendering {
         SDL_GPUShader* frag = createShaderSPIRV(device_, kcrtpi_frag_spv, kcrtpi_frag_spv_size, "main", SDL_GPU_SHADERSTAGE_FRAGMENT, 1, 1);
 #endif
         if (vert == nullptr || frag == nullptr) {
-            std::cerr << "CrtPiPipeline: creació de shaders fallida: " << SDL_GetError() << '\n';
+            Log::error("CrtPiPipeline", "creació de shaders fallida: {}", SDL_GetError());
             if (vert != nullptr) { SDL_ReleaseGPUShader(device_, vert); }
             if (frag != nullptr) { SDL_ReleaseGPUShader(device_, frag); }
             return false;
@@ -57,7 +57,7 @@ namespace Rendering {
         SDL_ReleaseGPUShader(device_, frag);
 
         if (pipeline_ == nullptr) {
-            std::cerr << "CrtPiPipeline: creació del pipeline ha fallat: " << SDL_GetError() << '\n';
+            Log::error("CrtPiPipeline", "creació del pipeline ha fallat: {}", SDL_GetError());
             return false;
         }