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>

bdk/storage/sdmmc.h

@@ -31,8 +31,13 @@ extern u32 sd_power_cycle_time_start;
 
 typedef enum _sdmmc_type
 {
-	MMC_SD   = 0,
-	MMC_EMMC = 1,
+	MMC_SD               = 0,
+	MMC_EMMC             = 1,
+	MMC_EMUMMC_FILE      = 2,
+	MMC_EMUMMC_RAW_SD    = 3,
+	MMC_EMUMMC_RAW_EMMC  = 4,
+	MMC_EMUMMC_FILE_EMMC = 5,
+	MMC_FILE_BASED       = 6,
 
 	EMMC_GPP   = 0,
 	EMMC_BOOT0 = 1,