feat: integrate Prettier with ESLint and CI pipeline

- Extend eslint-config-prettier to disable formatting rules
- Add check-format step to GitHub Actions workflow
- Ensure CI enforces code formatting standards

Issue: CLDSRV-723

Author: Seragonia

.github/workflows/tests.yaml

@@ -95,6 +95,8 @@ jobs:
         cache: pip
     - name: Install python deps
       run: pip install flake8
+    - name: Check code formatting
+      run: yarn run --silent check-format
     - name: Lint Javascript
       run: yarn run --silent lint -- --max-warnings 0
     - name: Lint Markdown

eslint.config.mjs

@@ -12,7 +12,7 @@ const compat = new FlatCompat({
     allConfig: js.configs.all
 });
 
-export default [...compat.extends('@scality/scality'), {
+export default [...compat.extends('@scality/scality'), ...compat.extends('prettier'), {
     plugins: {
         mocha,
     },