chore: update project branding to CITRON

Signed-off-by: Zephyron <zephyron@citron-emu.org>

src/CMakeLists.txt

@@ -88,7 +88,7 @@ if (MSVC)
         /wd4702 # unreachable code (when used with LTO)
     )
 
-    if (USE_CCACHE OR YUZU_USE_PRECOMPILED_HEADERS)
+    if (USE_CCACHE OR CITRON_USE_PRECOMPILED_HEADERS)
     # when caching, we need to use /Z7 to downgrade debug info to use an older but more cacheable format
     # Precompiled headers are deleted if not using /Z7. See https://github.com/nanoant/CMakePCHCompiler/issues/21
         add_compile_options(/Z7)
@@ -192,11 +192,11 @@ add_subdirectory(input_common)
 add_subdirectory(frontend_common)
 add_subdirectory(shader_recompiler)
 
-if (YUZU_ROOM)
+if (CITRON_ROOM)
      add_subdirectory(dedicated_room)
 endif()
 
-if (YUZU_TESTS)
+if (CITRON_TESTS)
     add_subdirectory(tests)
 endif()