Address PR review comments

- Remove unused deps @backstage/filter-predicates and zod-validation-error
  from catalog-model
- Deduplicate defaultCatalogEntityModel by re-exporting from the single
  source in model/defaultCatalogEntityModel.ts
- Fix typos: "Retuns"/"epxressed", "Obviopusly", "recorsively"
- Use domain-prefixed layer ID for scaffolder template model

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Fredrik Adelöw <freben@spotify.com>

yarn.lock

@@ -2814,7 +2814,6 @@ __metadata:
   dependencies:
     "@backstage/cli": "workspace:^"
     "@backstage/errors": "workspace:^"
-    "@backstage/filter-predicates": "workspace:^"
     "@backstage/types": "workspace:^"
     "@types/json-schema": "npm:^7.0.5"
     "@types/lodash": "npm:^4.14.151"
@@ -2823,7 +2822,6 @@ __metadata:
     lodash: "npm:^4.17.21"
     yaml: "npm:^2.0.0"
     zod: "npm:^3.25.76"
-    zod-validation-error: "npm:^4.0.2"
   languageName: unknown
   linkType: soft