feat(v2): Add a new link entry 'v2' for devfile v2

For now add only one entry for spring petclinic
related to eclipse-che/che#19906

Change-Id: I769f8013065249674b35748176ef8acdf847f671
Signed-off-by: Florent Benoit <fbenoit@redhat.com>

build/scripts/index.sh

@@ -15,6 +15,7 @@ for meta in "${metas[@]}"; do
     META_DIR=$(dirname "${meta}")
     # Workaround to include self-links, since it's not possible to
     # get filename in yq easily
-    echo -e "links:\n  self: /${META_DIR}/devfile.yaml" >> "${meta}"
+    # Extra links may already be there, so just update with self link
+    cat <<< $(yq --arg metadir "${META_DIR}" '.links |= . + {self: "/\($metadir)/devfile.yaml" }' ${meta})  > ${meta}
 done
 yq -s 'map(.)' "${metas[@]}"

devfiles/java-web-spring/meta.yaml

@@ -3,3 +3,5 @@ displayName: Java Spring Boot
 description: Java stack with OpenJDK 11 and Spring Boot Petclinic demo application
 tags: ["Java", "OpenJDK", "Maven", "Spring Boot"]
 icon: /images/springboot.svg
+links:
+  v2: https://github.com/che-samples/java-spring-petclinic/tree/devfilev2