Initial commit: Publisher dashboard monorepo

Turborepo + Bun monorepo with:
- apps/publisher-dashboard: Svelte 5 SPA with SvelteKit, Tailwind CSS v4, shadcn-svelte
- packages/publisher-utils: Shared TypeScript utilities

Features:
- Performance dashboard page with metrics, charts, and data tables
- shadcn-svelte UI components with OKLCH color system
- Biome for linting/formatting with Svelte-specific overrides

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/publisher-utils/src/index.ts

@@ -0,0 +1,11 @@
+export function greet(name: string): string {
+  return `Hello, ${name}!`;
+}
+
+export function formatDate(date: Date): string {
+  return date.toLocaleDateString("en-US", {
+    year: "numeric",
+    month: "long",
+    day: "numeric",
+  });
+}