Refactor common functionality into zelda3 namespace; remove references to core::common

src/app/editor/code/assembly_editor.h

@@ -3,7 +3,6 @@
 
 #include <string>
 
-#include "app/core/common.h"
 #include "app/editor/editor.h"
 #include "app/gui/modules/text_editor.h"
 #include "app/gui/style.h"

src/app/editor/graphics/tile16_editor.h

@@ -5,7 +5,6 @@
 #include <vector>
 
 #include "absl/status/status.h"
-#include "app/core/common.h"
 #include "app/editor/graphics/palette_editor.h"
 #include "app/gfx/bitmap.h"
 #include "app/gfx/snes_palette.h"

src/app/editor/message/message_data.cc

@@ -2,7 +2,6 @@
 
 #include <string>
 
-#include "app/core/common.h"
 #include "util/hex.h"
 #include "util/log.h"