Add Makefile, package.json, and initial configuration for VitePress and Slidev integration

- Introduced a Makefile for streamlined commands related to building, running, and managing presentations.
- Created package.json to define project metadata, dependencies, and scripts for development and testing.
- Added .gitignore entries to exclude build artifacts and temporary files from version control.
- Included playwright.config.mjs for end-to-end testing setup with Playwright.
- Added README.md for project documentation, outlining setup instructions and development guidelines.

.github/workflows/ci.yml

@@ -0,0 +1,70 @@
+# Tests unitaires + E2E Playwright (build statique complet)
+name: CI
+
+on:
+  push:
+    branches: [main, master, develop]
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  node:
+    name: Tests Node (contrats + cohérence + sync tmp)
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: npm
+
+      - name: Installer les dépendances
+        run: npm ci
+
+      - name: Tests Node (voir scripts/presentation-contracts.mjs)
+        run: npm run test:node
+
+  e2e:
+    name: E2E Playwright
+    runs-on: ubuntu-latest
+    timeout-minutes: 25
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: npm
+
+      - name: Installer les dépendances
+        run: npm ci
+
+      - name: Navigateur Chromium + dépendances système
+        run: npx playwright install chromium --with-deps
+
+      - name: Parcours E2E (build + serve dist)
+        run: npm run test:e2e
+        env:
+          CI: true
+
+      - name: Rapport Playwright (échec)
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: playwright-report
+          path: playwright-report/
+          retention-days: 7
+
+      - name: Traces Playwright (échec)
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results
+          path: test-results/
+          retention-days: 7