Update CMake include directories for improved modularity and organization

- Refactored target_include_directories in app.cmake, emu.cmake, and z3ed.cmake to use absolute paths for better clarity and maintainability.
- Updated test_manager.cc and test_manager.h to simplify ImGui header inclusion.
- Enhanced test CMakeLists.txt to conditionally include directories for the extract_vanilla_values utility, ensuring proper integration with the new structure.

src/cli/z3ed.cmake

@@ -33,9 +33,11 @@ add_executable(
 
 target_include_directories(
   z3ed PUBLIC
-  lib/
-  app/
-  ${ASAR_INCLUDE_DIRS}
+  ${CMAKE_SOURCE_DIR}/src/lib/
+  ${CMAKE_SOURCE_DIR}/src/app/
+  ${CMAKE_SOURCE_DIR}/src/lib/asar/src
+  ${CMAKE_SOURCE_DIR}/src/lib/asar/src/asar
+  ${CMAKE_SOURCE_DIR}/src/lib/asar/src/asar-dll-bindings/c
   ${CMAKE_SOURCE_DIR}/incl/
   ${CMAKE_SOURCE_DIR}/src/
   ${PNG_INCLUDE_DIRS}