feat: add transformEntry option

[yooouuri]

This way, I can "inject" a SSR Vue app.

The implementation, runs the same transformEntry for every entry. Maybe move the entry check from the transform?

Example:

    build({
      entry: 'src/index.ts',
      transformEntry: (code) => {
        const template = readFileSync(join(process.cwd(), 'dist', 'index.html'), 'utf-8')

        const mod = parseModule(`import { render } from './app/entry-server'
${code}
let template = \`${template}\`
app.get('*', async (c) => {
const { html, payload } = await render()
template = template.replace('<!--app-html-->', html)
template = template.replace('<!--payload-->', '<script>window.__payload = ' + JSON.stringify(payload ?? {}) + '</script>')
return c.html(template)
})

export default app`)

        return mod.generate()
      },
      minify: false,
      external: [
        'vue',
        'hono',
        'pinia',
        '@pinia/colada',
      ],
      staticPaths: ['./assets']
    }),

[changeset-bot]

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