feat: improve test & bundler (#14434)

#### PR Dependency Tree


* **PR #14434** 👈

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**
* Introduced rspack bundler as an alternative to webpack for optimized
builds.

* **Tests & Quality**
* Added comprehensive editor semantic tests covering markdown, hotkeys,
and slash-menu operations.
* Expanded CI cross-browser testing to Chromium, Firefox, and WebKit;
improved shape-rendering tests to account for zoom.

* **Bug Fixes**
  * Corrected CSS overlay styling for development servers.
  * Fixed TypeScript typings for build tooling.

* **Other**
  * Document duplication now produces consistent "(n)" suffixes.
  * French i18n completeness increased to 100%.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tools/cli/package.json

@@ -19,6 +19,8 @@
     "@affine/s3-compat": "workspace:*",
     "@napi-rs/simple-git": "^0.1.22",
     "@perfsee/webpack": "^1.13.0",
+    "@rspack/core": "^1.7.6",
+    "@rspack/dev-server": "^1.1.3",
     "@sentry/webpack-plugin": "^4.0.0",
     "@swc/core": "^1.10.1",
     "@tailwindcss/postcss": "^4.0.0",