feat: initial scaffold — MVP catalogue de données d'API

- Backend NestJS : CRUD api_entries + categories, upload YAML multi-fichiers,
  génération docs AsyncAPI (@asyncapi/cli@6.0.0) et OpenAPI (redocly)
- Fix: route wildcard GET /api/apis/:id/*path pour servir les assets statiques
  (CSS/JS) générés par AsyncAPI HTML template (contournement bug path-to-regexp v8)
- Frontend Angular 19 : pages catalog, browse, api-detail, doc-viewer, upload (DSFR)
- Seeder de données de démo (idempotent)
- Docker Compose dev + Dockerfiles + manifests K8s
- Documentation : README, architecture, référence API REST

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

infra/Dockerfile.back.dev

@@ -0,0 +1,24 @@
+FROM node:22-alpine
+
+# Install git (required by asyncapi html-template installer)
+RUN apk add --no-cache git
+
+# Install pnpm
+RUN npm install -g pnpm@10.33.0
+
+# Install AsyncAPI CLI and Redocly CLI for docs generation
+RUN npm install -g @asyncapi/cli@6.0.0 @redocly/cli
+
+# Pre-cache the AsyncAPI html-template so generation works on first startup
+RUN mkdir -p /tmp/asyncapi-warmup /tmp/asyncapi-warmup/out && \
+    printf 'asyncapi: "3.0.0"\ninfo:\n  title: Warmup\n  version: "1.0.0"\nchannels: {}\n' \
+      > /tmp/asyncapi-warmup/spec.yaml && \
+    asyncapi generate fromTemplate /tmp/asyncapi-warmup/spec.yaml @asyncapi/html-template \
+      --output /tmp/asyncapi-warmup/out --no-interactive --install --force-write 2>&1 || true && \
+    rm -rf /tmp/asyncapi-warmup
+
+WORKDIR /workspace
+
+EXPOSE 3000
+
+CMD ["pnpm", "run", "start:dev"]