## Current Behavior
The `HtmlRspackPlugin` does not support interpolation of %VAR% in the
index.html.
This is supported with a custom Webpack Plugin for `@nx/webpack` for
generating index.html files.
## Expected Behavior
The `@nx/rspack` plugin should support the same feature set as webpack
for seamless migration.
Add a new `WriteIndexHtmlPlugin` for Rspack to support this.
It should only be used when `useLegacyHtmlPlugin` is set to true
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