docs: add a workaround to isolatedModules: true

[fwouts]

Description

I recently published a Rollup plugin designed for TypeScript projects that aren't ready to transition to isolatedModules: true (this is used in React Preview, for example). This PR points to it from the documentation, in the hope that it will help projects move to Vite more easily.

Feel free to close this PR—I'd understand if we prefer not to point to barely known third-party plugins from the official docs!

Additional context

See evanw/esbuild#1398 for some prior discussion about integrating this directly into esbuild.

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[hyf0]

Great guidance. It's very of help for migrating some old and big history ts project.