👷(ci) add sharding e2e tests

e2e tests take too long to run. We can easily reduce this time by 2 by adding
shards

.github/workflows/people.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
-            fetch-depth: 0
+          fetch-depth: 0
       - name: show
         run: git log
       - name: Enforce absence of print statements in code
@@ -39,7 +39,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
-            fetch-depth: 0
+          fetch-depth: 0
       - name: Check that the CHANGELOG has been modified in the current branch
         run: git whatchanged --name-only --pretty="" origin/${{ github.event.pull_request.base.ref }}..HEAD | grep CHANGELOG
 
@@ -139,7 +139,7 @@ jobs:
         with:
           path: 'src/frontend/**/node_modules'
           key: front-node_modules-${{ hashFiles('src/frontend/**/yarn.lock') }}
-        
+
       - name: Check linting
         run: cd src/frontend/ && yarn lint
 
@@ -147,6 +147,11 @@ jobs:
     runs-on: ubuntu-latest
     needs: [build-mails, build-front]
     timeout-minutes: 10
+    strategy:
+      fail-fast: false
+      matrix:
+        shardIndex: [1, 2, 3, 4]
+        shardTotal: [4]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -196,15 +201,27 @@ jobs:
         run: cd src/frontend/apps/e2e && yarn install
 
       - name: Run e2e tests
-        run: cd src/frontend/ && yarn e2e:test
+        run: cd src/frontend/ && yarn e2e:test --shard=${{ matrix.shardIndex }}/${{ matrix.shardTotal }}
 
       - uses: actions/upload-artifact@v4
         if: always()
         with:
-          name: playwright-report
+          name: playwright-report-${{ matrix.shardIndex }}
           path: src/frontend/apps/e2e/report/
           retention-days: 7
 
+  tests-e2e-feedback:
+    runs-on: ubuntu-latest
+    needs: [test-e2e]
+    if: always()
+    steps:
+      - name: All tests ok
+        if: ${{ !(contains(needs.*.result, 'failure')) }}
+        run: exit 0
+      - name: Some tests failed
+        if: ${{ contains(needs.*.result, 'failure') }}
+        run: exit 1
+
   build-mails:
     runs-on: ubuntu-latest
     defaults:
@@ -226,8 +243,8 @@ jobs:
       - name: Persist mails' templates
         uses: actions/upload-artifact@v4
         with:
-            name: mails-templates
-            path: src/backend/core/templates/mail
+          name: mails-templates
+          path: src/backend/core/templates/mail
 
   lint-back:
     runs-on: ubuntu-latest