add files from m63202: HEIF prdi: Canon

data/file_features/under_consideration/HEIF_progressive/progressive-diagonal.json

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+{
+  "contributor": "Canon Research Centre France",
+  "description": "Diagonal progressive rendering of a grid derived item using 'prdi' item property and 'prgr' entity group.",
+  "mdms_number": "m63202",
+  "rel_filepath": "./progressive-diagonal.heic",
+  "associated_files": [],
+  "version": 1,
+  "md5": "2e33050a41c20f8b874e5534cb546413",
+  "published": false,
+  "features": [],
+  "conforms_to": [],
+  "notes": "The progressive-diagonal.heic conformance sample is an example where a base quality image is progressively refined starting from the top-left and ending at the bottom-right. In this figure, for each cell, the large number indicates the item_id of the corresponding input image, and the small number at the bottom left indicates the progressive rendering step for this cell.",
+  "license": ""
+}

data/file_features/under_consideration/HEIF_progressive/progressive-diagonal_gpac.ext.json

@@ -0,0 +1,16 @@
+{
+  "mp4boxVersion": "MP4Box - GPAC version 2.3-DEV-rev526-gef57f603-master",
+  "rel_filepath": "./progressive-diagonal.heic",
+  "extensions": [
+    {
+      "location": "file.meta.iprp.ipco",
+      "box": {
+        "@Size": "26",
+        "@Type": "prdi",
+        "@Specification": "unknown",
+        "@Container": "ipco",
+        "@data": "0x000000000006000100020003000300020001"
+      }
+    }
+  ]
+}