[Feature]: Support yaml and toml

[SoonIter]

What problem does this feature solve?

we currently have already supported json. Yaml, toml can be supported in same way but it is not documented right now

What does the proposed API look like?

https://rsbuild.dev/guide/basic/json-files#yaml-file

https://lib.rsbuild.dev/zh/guide/advanced/json-files

// rslib.config.ts
import { pluginYaml } from '@rsbuild/plugin-yaml';

plugins: [pluginYaml()]

1. support yaml by pluginYaml
2. support toml by pluginToml

:) Looking forward to someone kind to bring it to fruition. Maybe in two pr with test cases and documents