Use 'latest' tag as default for ModelKit references (#935)

* latest tag

Signed-off-by: mohammed <[email protected]>

* fix filed test

Signed-off-by: mohammed <[email protected]>

---------

Signed-off-by: mohammed <[email protected]>

Author: mohammedahmed18

pkg/lib/repo/util/reference.go

@@ -104,6 +104,7 @@ func ParseReference(refString string) (reference *registry.Reference, extraTags
 		ref = unprocessed[index+1:]
 	} else {
 		// No tag or digest
+		ref = "latest"
 		repo = unprocessed
 	}
 

pkg/lib/repo/util/reference_test.go

@@ -66,12 +66,12 @@ func TestParseReference(t *testing.T) {
 		},
 		{
 			input:        "a/b/c/d",
-			expectedRef:  reference("localhost", "a/b/c/d", ""),
+			expectedRef:  reference("localhost", "a/b/c/d", "latest"),
 			expectedTags: []string{},
 		},
 		{
 			input:        "test.io/a/b/c/d",
-			expectedRef:  reference("test.io", "a/b/c/d", ""),
+			expectedRef:  reference("test.io", "a/b/c/d", "latest"),
 			expectedTags: []string{},
 		},
 		{