Show a warning message if the path of /ventoy/ventoy.json case mismatch.

INSTALL/grub/grub.cfg

@@ -1940,9 +1940,11 @@ vt_load_part_table $vtoydev
 
 #Load Plugin
 if [ -f $vtoy_iso_part/ventoy/ventoy.json ]; then
-   clear
-   vt_load_plugin $vtoy_iso_part
-   clear
+    clear
+    vt_load_plugin $vtoy_iso_part
+    clear
+else
+    vt_check_json_path_case $vtoy_iso_part
 fi
 
 if [ -n "$VTOY_MENU_TIMEOUT" ]; then
@@ -2009,6 +2011,15 @@ if [ -n "$VTOY_DEFAULT_KBD_LAYOUT" ]; then
     set_keyboard_layout "$VTOY_DEFAULT_KBD_LAYOUT"
 fi
 
+if [ -n "$VTOY_PLUGIN_PATH_CASE_MISMATCH" ]; then
+    clear
+    echo "$VTOY_PLUGIN_PATH_CASE_MISMATCH"
+    echo -e "\n\nPath case does not match! ventoy directory and ventoy.json MUST be all lowercase!"
+    echo -e "\n路径大小写不匹配！ventoy 目录和 ventoy.json 文件的名字必须是全部小写，请修正！"
+    echo -e "\n\npress ENTER to continue (请按回车键继续) ..."
+    read vtInputKey
+fi
+
 if [ -n "$VTOY_PLUGIN_SYNTAX_ERROR" ]; then
     clear
     echo -e "\n Syntax error detected in ventoy.json, please check! \n"