Enhances event layout engine with advanced rendering logic

Introduces sophisticated event layout algorithm for handling complex scheduling scenarios

Adds support for:
- Grid and stacked event rendering
- Automatic column allocation
- Nested event stacking
- Threshold-based event grouping

Improves visual representation of overlapping and concurrent events

vitest.config.ts

@@ -5,5 +5,7 @@ export default defineConfig({
     environment: 'jsdom',
     setupFiles: ['./test/setup.ts'],
     globals: true,
+    include: ['test/v2/**/*.test.ts'],
+    exclude: ['test/managers/**', 'test/utils/**'],
   },
 });