Chore: Add codemod and betterer config to make barrel imports explicit (#80913)

* chore: add codemod for highlighting barrel imports

* style(frontend): add no-barrel-files plugin to betterer

* chore(betterer): update betterer file

* ci(frontend-metrics): track occurrences of barrel files being imported

* chore: clean up explicit barrel imports codemod script

* chore(codeowners): add explicit barrel imports script

* Add no-barrel-files plugin to betterer configuration

Co-Authored-By: LeventeBalogh <balogh.levente.hu@gmail.com>

---------

Co-authored-by: LeventeBalogh <balogh.levente.hu@gmail.com>

scripts/ci-frontend-metrics.sh

@@ -11,6 +11,7 @@ ACCESSIBILITY_ERRORS="$(grep -oP '\"errors\":(\d+),' pa11y-ci-results.json | gre
 DIRECTIVES="$(grep -r -o  directive public/app/ | wc -l)"
 CONTROLLERS="$(grep -r -oP 'class .*Ctrl' public/app/ | wc -l)"
 LEGACY_FORMS="$(grep -r -oP 'LegacyForms;' public/app | wc -l)"
+BARREL_IMPORTS="$(grep -r -oP '@todo: replace barrel import path' public/app | wc -l)"
 CLASSNAME_PROP="$(grep -r -o -E --include="*.ts*" "\.*.className=\W.*\W.*" public/app | wc -l)"
 EMOTION_IMPORTS="$(grep -r -o -E --include="*.ts*" --exclude="*.test*" "\{.*css.*\} from '@emotion/css'" public/app | wc -l)"
 TS_FILES="$(find public/app -type f -name "*.ts*" -not -name "*.test*" | wc -l)"
@@ -29,6 +30,7 @@ echo -e "Accessibility errors: $ACCESSIBILITY_ERRORS"
 echo -e "Directives: $DIRECTIVES"
 echo -e "Controllers: $CONTROLLERS"
 echo -e "Legacy forms: $LEGACY_FORMS"
+echo -e "Barrel imports: $BARREL_IMPORTS"
 echo -e "Total bundle folder size: $TOTAL_BUNDLE"
 echo -e "Total outdated dependencies: $OUTDATED_DEPENDENCIES"
 echo -e "Low vulnerabilities: $LOW_VULNERABILITIES"