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/spring-ai/meta.json

@@ -0,0 +1,8 @@
+{
+  "slug": "spring-ai",
+  "title": "Spring AI",
+  "description": "Intégrer des modèles LLM dans l’écosystème Spring avec des API cohérentes.",
+  "tags": ["java", "spring", "llm", "ai"],
+  "order": 2,
+  "featured": true
+}