Sets up calendar package with core infrastructure

Adds core calendar package components including:
- Base services for events, resources, and settings
- Calendar app and orchestrator
- Build and bundling configuration
- IndexedDB storage setup

Prepares foundational architecture for calendar functionality

test-package/build.js

@@ -0,0 +1,23 @@
+import esbuild from 'esbuild';
+import { NovadiUnplugin } from '@novadi/core/unplugin';
+import { copyFileSync, mkdirSync } from 'fs';
+
+// Ensure dist/css directory exists
+mkdirSync('dist/css', { recursive: true });
+
+// Copy calendar CSS
+copyFileSync(
+  'node_modules/calendar/dist/css/calendar.css',
+  'dist/css/calendar.css'
+);
+
+await esbuild.build({
+  entryPoints: ['src/index.ts'],
+  bundle: true,
+  outfile: 'dist/bundle.js',
+  format: 'esm',
+  platform: 'browser',
+  plugins: [NovadiUnplugin.esbuild()]
+});
+
+console.log('Build complete');