feat: export transformWithEsbuild

[bluwy]

Description

Expose transformWithEsbuild from the vite package. Also fixes tsconfigRaw merging for transformWithEsbuild and perf improvements.

Additional context

• transformWithEsbuild is currently already exposed under server, but I don't see it coupled to the server. It could be used as a standalone.
• This also allows vite-plugin-svelte to use it for preprocessing a Svelte file script tag with lang="ts"
• Do we want to deprecate server.transformWithEsbuild?

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
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[benmccann]

Should the "b" be capitalized? I.e. transformWithEsBuild?

[bluwy]

I think transformWithEsbuild reads fine too as esbuild is usually all lower caps, but in code we capitalise the first e.

[yyx990803]

Yes I think we can deprecate server.transformWithEsbuild with this.

[bluwy]

Added deprecation jsdoc for server.transformWithEsbuild and removed docs for it.

Currently, the vue plugin is still using server.transformWithEsbuild. With the new API, it seems that it could benefit from a sizable refactor so I'm not touching it for now. It should still work as before.

vite/packages/plugin-vue/src/main.ts

Line 261 in e623b4a

const result = await options.devServer!.transformWithEsbuild(