chore(testing): add unit tests and update core render/network pipelines

- add new tests:
  - test_blp_loader.cpp
  - test_dbc_loader.cpp
  - test_entity.cpp
  - test_frustum.cpp
  - test_m2_structs.cpp
  - test_opcode_table.cpp
  - test_packet.cpp
  - test_srp.cpp
  - CMakeLists.txt
- add docs and progress tracking:
  - TESTING.md
  - perf_baseline.md
- update project config/build:
  - .gitignore
  - CMakeLists.txt
  - test.sh
- core engine updates:
  - application.cpp
  - game_handler.cpp
  - world_socket.cpp
  - adt_loader.cpp
  - asset_manager.cpp
  - m2_renderer.cpp
  - post_process_pipeline.cpp
  - renderer.cpp
  - terrain_manager.cpp
  - game_screen.cpp
- add profiler header:
  - profiler.hpp

src/rendering/post_process_pipeline.cpp

@@ -8,6 +8,7 @@
 #include "rendering/camera.hpp"
 #include "rendering/amd_fsr3_runtime.hpp"
 #include "core/logger.hpp"
+#include "core/profiler.hpp"
 #include <cstdlib>
 #include <algorithm>
 #include <glm/gtc/matrix_inverse.hpp>
@@ -152,6 +153,7 @@ bool PostProcessPipeline::hasActivePostProcess() const {
 
 bool PostProcessPipeline::executePostProcessing(VkCommandBuffer cmd, uint32_t imageIndex,
                                                   Camera* camera, float deltaTime) {
+    ZoneScopedN("PostProcess::execute");
     currentCmd_ = cmd;
     camera_ = camera;
     lastDeltaTime_ = deltaTime;