feat: add git_diff_blobs function

Author: MikeJerred

generate/input/descriptor.json

@@ -1221,10 +1221,42 @@
           "return": {
             "isErrorCode": true
           },
-         "isAsync": true
+          "isAsync": true
         },
         "git_diff_blobs": {
-          "ignore": true
+          "args": {
+            "old_blob" : {
+              "isOptional": true
+            },
+            "old_as_path" : {
+              "isOptional": true
+            },
+            "new_blob" : {
+              "isOptional": true
+            },
+            "new_as_path" : {
+              "isOptional": true
+            },
+            "options" : {
+              "isOptional": true
+            },
+            "file_cb" : {
+              "isOptional": true
+            },
+            "binary_cb": {
+              "isOptional": true
+            },
+            "hunk_cb" : {
+              "isOptional": true
+            },
+            "line_cb" : {
+              "isOptional": true
+            }
+          },
+          "return": {
+            "isErrorCode": true
+          },
+          "isAsync": true
         },
         "git_diff_buffers": {
           "ignore": true