EXIF: add support for Windows Explorer tags

autotests/read/jxl/gimp_exif.jxl.json

@@ -12,6 +12,14 @@
                 "key" : "ModificationDate",
                 "value" : "2025-01-05T10:18:16"
             },
+            {
+                "key" : "Keywords",
+                "value" : "kde;w11"
+            },
+            {
+                "key" : "Rating",
+                "value" : "4"
+            },
             {
                 "key" : "Software" ,
                 "value" : "GIMP 3.0.0-RC2"

autotests/read/jxr/metadata.jxr.json

@@ -59,6 +59,14 @@
             {
                 "key" : "Model",
                 "value" : "KImageFormats"
+            },
+            {
+                "key" : "Keywords",
+                "value" : "broacast;test;kde"
+            },
+            {
+                "key" : "Rating",
+                "value" : "5"
             }
         ],
         "resolution" : {

autotests/write/basic/jxl.json

@@ -37,6 +37,14 @@
             "key" : "Description",
             "value" : "テレビ放送テスト映像。(TV broadcast test image.)"
         },
+        {
+            "key" : "Keywords",
+            "value" : "kde;test"
+        },
+        {
+            "key" : "Rating",
+            "value" : "5"
+        },
         {
             "key" : "Latitude",
             "value" : "44.6478"

autotests/write/basic/jxr.json

@@ -29,6 +29,10 @@
             "key" : "Description",
             "value" : "TV broadcast test image."
         },
+        {
+            "key" : "Rating",
+            "value" : "4"
+        },
         {
             "key" : "Latitude",
             "value" : "44.6478"