feat: improve grouping perf in edgeless (#14442)

fix #14433 

#### PR Dependency Tree


* **PR #14442** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
  * Level-of-detail thumbnails for large images.
  * Adaptive pacing for snapping, distribution and other alignment work.
  * RAF coalescer utility to batch high-frequency updates.
  * Operation timing utility to measure synchronous work.

* **Improvements**
* Batch group/ungroup reparenting that preserves element order and
selection.
  * Coalesced panning and drag updates to reduce jitter.
* Connector/group indexing for more reliable updates, deletions and
sync.
  * Throttled viewport refresh behavior.

* **Documentation**
  * Docs added for RAF coalescer and measureOperation.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/gfx/pointer/vitest.config.ts

@@ -0,0 +1,25 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  esbuild: {
+    target: 'es2018',
+  },
+  test: {
+    globalSetup: '../../../scripts/vitest-global.js',
+    include: ['src/__tests__/**/*.unit.spec.ts'],
+    testTimeout: 1000,
+    coverage: {
+      provider: 'istanbul',
+      reporter: ['lcov'],
+      reportsDirectory: '../../../.coverage/affine-gfx-pointer',
+    },
+    onConsoleLog(log, type) {
+      if (log.includes('lit.dev/msg/dev-mode')) {
+        return false;
+      }
+      console.warn(`Unexpected ${type} log`, log);
+      throw new Error(log);
+    },
+    environment: 'happy-dom',
+  },
+});