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.

slides/kubernetes-operators/meta.json

@@ -0,0 +1,8 @@
+{
+  "slug": "kubernetes-operators",
+  "title": "Kubernetes Operators — De l’enfer au paradis",
+  "description": "Mental model (API, etcd, boucle), controllers et opérateurs, exemples concrets (Reflector, Reloader, cert-manager, Postgres) et pièges à éviter.",
+  "tags": ["kubernetes", "operators", "devops", "controllers"],
+  "order": 1,
+  "featured": true
+}