feat: read size and ratio of an image and provide the recommended size (#2971)

* Add the information about the size and ratio of the read image

* feat: use available aspect ratios from config, move function to util, change default visibility of label

* refactor: extract sdxl aspect ratios to flags, use in describe

as discussed in
https://github.com/lllyasviel/Fooocus/pull/2971#discussion_r1608493765
https://github.com/lllyasviel/Fooocus/pull/2971#issuecomment-2123620595

---------

Co-authored-by: Manuel Schmid <dev@mash1t.de>
Co-authored-by: Manuel Schmid <9307310+mashb1t@users.noreply.github.com>

modules/flags.py

@@ -81,6 +81,13 @@ inpaint_options = [inpaint_option_default, inpaint_option_detail, inpaint_option
 desc_type_photo = 'Photograph'
 desc_type_anime = 'Art/Anime'
 
+sdxl_aspect_ratios = [
+    '704*1408', '704*1344', '768*1344', '768*1280', '832*1216', '832*1152',
+    '896*1152', '896*1088', '960*1088', '960*1024', '1024*1024', '1024*960',
+    '1088*960', '1088*896', '1152*896', '1152*832', '1216*832', '1280*768',
+    '1344*768', '1344*704', '1408*704', '1472*704', '1536*640', '1600*640',
+    '1664*576', '1728*576'
+]
 
 class MetadataScheme(Enum):
     FOOOCUS = 'fooocus'