Add webpack as optional peer dependency

[hardfist]

Feature Proposal

Rspack use webpack-dev-server internally to compatible with devServer functionality but it will cause install warning because lack of webpack. see web-infra-dev/rspack#2318

└─┬ @rspack/cli 0.1.1
  └─┬ @rspack/dev-server 0.1.1
    ├─┬ webpack-dev-server 4.11.1
    │ ├── ✕ missing peer webpack@"^4.37.0 || ^5.0.0"
    │ └─┬ webpack-dev-middleware 5.3.3
    │   └── ✕ missing peer webpack@"^4.0.0 || ^5.0.0"
    └─┬ @rspack/dev-middleware 0.1.1
      └─┬ webpack-dev-middleware 6.0.0
        └── ✕ missing peer webpack@^5.0.0
Peer dependencies that should be installed:
  webpack@">=5.0.0 <6.0.0"

we are wondering whether webpack-dev-server could list webpack as optional peer dependency to help avoid this warning in rspack

Feature Use Case

support use webpack-dev-server in rspack

Please paste the results of npx webpack-cli info here, and mention other relevant information

none

[alexander-akait]

Because now we have rspack let's do it, previously only webpack can be used, so it don't make sense 😄 , do you want to send a PR?