Nyx: emuMMC Manage window, Tools UI, and misc updates

- Add gui_emu_tools: emuMMC Manage window with correct positioning (LV_PROTECT_PARENT + re-parent to win)
- Tools: single SD button (tap = SD partition manager, 3s hold = eMMC)
- Remove emuSD from Nyx UI (tabs, UMS, partition manager); keep bootloader emusd
- Shorten Create emuMMC description text by one character
- Storage/build/config and dependency updates

Co-authored-by: Cursor <cursoragent@cursor.com>

nyx/nyx_gui/frontend/gui_tools.h

@@ -25,5 +25,6 @@ void create_tab_tools(lv_theme_t *th, lv_obj_t *parent);
 void nyx_run_ums(void *param);
 bool get_set_autorcm_status(bool change);
 lv_res_t action_ums_sd(lv_obj_t *btn);
+lv_res_t action_ums_emmc_gpp(lv_obj_t *btn);
 
 #endif