Strip legacy save/settings systems for a unified savemanager rewrite; split uielement list out of uielement.c

Removes the per-platform save/savestream/autosave implementations, the settings UI frames, and the autosave overlay, replacing them with a savemanager.c/h + savefile.h/savedevice.h scaffold to build the new save system on top of. Also separates the concrete UI_ELEMENTS registration into uielementlist.h/.c so uielement.c only holds the generic per-element lifecycle logic.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/duskdolphin/system/systemdolphin.c

@@ -39,4 +39,12 @@ int32_t systemGetAspectRatioDolphin(void) {
 
 int32_t systemGetLanguageDolphin(void) {
   return CONF_GetLanguage();
+}
+
+const localeinfo_t * systemGetLocaleDolphin(void) {
+  switch(systemGetLanguageDolphin()) {
+    case CONF_LANG_JAPANESE: return &LOCALE_INFO_JP_JP;
+    case CONF_LANG_SPANISH: return &LOCALE_INFO_ES_MX;
+    default: return &LOCALE_DEFAULT;
+  }
 }

src/duskdolphin/system/systemdolphin.h

@@ -47,5 +47,13 @@ int32_t systemGetAspectRatioDolphin(void);
  */
 int32_t systemGetLanguageDolphin(void);
 
+/**
+ * Returns the locale matching the system's configured language, falling
+ * back to LOCALE_DEFAULT if the system language has no matching locale.
+ *
+ * @return The current locale.
+ */
+const localeinfo_t * systemGetLocaleDolphin(void);
+
 // There's actually a tonne more things Wii can return, this is it for now
 // though.

src/duskdolphin/system/systemplatform.h

@@ -9,4 +9,5 @@
 #include "system/systemdolphin.h"
 
 #define systemInitPlatform systemInitDolphin
-#define systemGetActiveDialogTypePlatform systemGetActiveDialogTypeDolphin
+#define systemGetActiveDialogTypePlatform systemGetActiveDialogTypeDolphin
+#define systemGetLocalePlatform systemGetLocaleDolphin