fix(core): createdBundledHighlighter cause wasm engine to be loaded

[fuma-nama]

Description

While playing with JavaScript Regex engine and getSingletonHighlighter, I noticed that the WASM engine was loaded regardless of my engine option, and it is indeed using the JavaScript engine.

After looking into the codebase, I found:

    const core = await createHighlighterCore({
      engine: engine(),

In the code of createdBundledHighlighter (highlighter factory), this causes engine to be called and hence the WASM engine is loaded with lazy import, even if it is unused.

Linked Issues

N/A

Additional context

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