style: remove eslint with frontend code removal ADR

- Add ADR for frontend code removal
- Drop eslint, as explained in the ADR

.github/workflows/quality-checks.yml

@@ -60,29 +60,28 @@ jobs:
           PIP_SRC: ${{ runner.temp }}
         run: |
           make test-requirements
-      
+
       - name: Install npm
         env:
           PIP_SRC: ${{ runner.temp }}
-        run: npm ci  
-      
+        run: npm ci
+
       - name: Install python packages
         env:
           PIP_SRC: ${{ runner.temp }}
         run: |
             pip install -e .
-      
+
       - name: Run Quality Tests
         env:
           PIP_SRC: ${{ runner.temp }}
           TARGET_BRANCH: ${{ github.base_ref }}
         run: |
             make pycodestyle
-            npm run lint
             make xsslint
             make pii_check
             make check_keywords
-          
+
       - name: Save Job Artifacts
         if: always()
         uses: actions/upload-artifact@v4