perf: self-host fonts, drop unused generated code and add swf tests

- Self-host Nunito and Pixelify Sans via next/font instead of Google Fonts CDN
  (removes render-blocking external stylesheets and preconnects)
- Remove stale mariadb entry from serverExternalPackages (app uses mysql2)
- Exclude unused src/generated Prisma client from typecheck and remove it
- Add unit tests for swf-parser, effectmap and figuremap (0% coverage -> 90%+)

next.config.ts

@@ -36,7 +36,7 @@ const securityHeaders = [
 const nextConfig: NextConfig = {
 	cacheComponents: true, // <-- Dit activeert Cache Components en lost de 'instant' build-fout op!
 	deploymentId: resolveDeploymentId(),
-	serverExternalPackages: ["mariadb", "lzma", "sharp", "pino", "pino-pretty"],
+	serverExternalPackages: ["lzma", "sharp", "pino", "pino-pretty"],
 
 	// Onderdruk de specifieke Turbopack waarschuwingen voor brede bestandspatronen in de lib-map
 	turbopack: {