Fix @ngrx dependency resolution for Angular 20 compatibility

Co-authored-by: michaelschoenbaechler <49410646+michaelschoenbaechler@users.noreply.github.com>

Author: Copilot

package-lock.json

@@ -34,8 +34,8 @@
     "@ionic/storage-angular": "^4.0.0",
     "@jsverse/transloco": "^7.6.1",
     "@ngneat/until-destroy": "^10.0.0",
-    "@ngrx/operators": "^19.2.1",
-    "@ngrx/signals": "^19.2.1",
+    "@ngrx/operators": "^20.0.0-rc.0",
+    "@ngrx/signals": "^20.0.0-rc.0",
     "ionicons": "^7.2.2",
     "lodash": "^4.17.21",
     "rxjs": "~7.8.1",
@@ -66,7 +66,7 @@
     "eslint-import-resolver-typescript": "^3.6.1",
     "eslint-plugin-import": "2.29.1",
     "eslint-plugin-jsdoc": "48.0.2",
-    "eslint-plugin-unused-imports": "^3.0.0",
+    "eslint-plugin-unused-imports": "^4.1.4",
     "husky": "^8.0.3",
     "prettier": "^3.2.2",
     "ts-node": "~10.9.2",