Ajout d'une pipeline ci/cd

2 jobs ont la notion allow_failure: true le temps que ces étapes soient prisent en compte.

.gitlab-ci.yml

+image: node:22
+
+stages:
+  - build
+  - test
+
+cache:
+  paths:
+    - node_modules/
+
+build:
+  stage: build
+  script:
+    - npm ci
+    - npm run build
+
+linter:
+  stage: test
+  script:
+    - npm ci
+    - npm run lint
+  allow_failure: true
+
+test:
+  stage: test
+  script:
+    - npm ci
+    - npm run test -- --passWithNoTests
+  allow_failure: true