chore: add maven local as first repo (#393)

Author: wolf4ood

plugins/edc-build/src/main/java/org/eclipse/edc/plugins/edcbuild/conventions/RepositoriesConvention.java

@@ -26,8 +26,8 @@ class RepositoriesConvention implements EdcConvention {
     @Override
     public void apply(Project target) {
         var handler = target.getRepositories();
-        handler.maven(r -> r.setUrl(URI.create(Repositories.SNAPSHOT_REPO_URL)));
         handler.mavenLocal();
+        handler.maven(r -> r.setUrl(URI.create(Repositories.SNAPSHOT_REPO_URL)));
         handler.mavenCentral();
         handler.maven(r -> r.setUrl(URI.create(Repositories.DEPRECATED_SNAPSHOT_REPO_URL)));
     }