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

packages/calendar/build.js

@@ -0,0 +1,47 @@
+import * as esbuild from 'esbuild';
+import { NovadiUnplugin } from '@novadi/core/unplugin';
+import * as fs from 'fs';
+import * as path from 'path';
+
+const entryPoints = [
+  'src/index.ts',
+  'src/extensions/teams/index.ts',
+  'src/extensions/departments/index.ts',
+  'src/extensions/bookings/index.ts',
+  'src/extensions/customers/index.ts',
+  'src/extensions/schedules/index.ts',
+  'src/extensions/audit/index.ts'
+];
+
+async function build() {
+  await esbuild.build({
+    entryPoints,
+    bundle: true,
+    outdir: 'dist',
+    format: 'esm',
+    platform: 'browser',
+    external: ['@novadi/core', 'dayjs'],
+    splitting: true,
+    sourcemap: true,
+    target: 'es2020',
+    plugins: [NovadiUnplugin.esbuild({ debug: false, enableAutowiring: true })]
+  });
+
+  console.log('Build complete: dist/');
+
+  // Bundle CSS
+  const cssDir = 'dist/css';
+  if (!fs.existsSync(cssDir)) {
+    fs.mkdirSync(cssDir, { recursive: true });
+  }
+  const cssFiles = [
+    '../../wwwroot/css/calendar-base.css',
+    '../../wwwroot/css/calendar-layout.css',
+    '../../wwwroot/css/calendar-events.css'
+  ];
+  const bundledCss = cssFiles.map(f => fs.readFileSync(f, 'utf8')).join('\n');
+  fs.writeFileSync(path.join(cssDir, 'calendar.css'), bundledCss);
+  console.log('CSS bundled: dist/css/calendar.css');
+}
+
+build();