Add bundlesizeOptimizations options to docs

[Lms24]

we export options around automating tree shaking but don't document them at the moment. We should add the options to the documentation generation script.

[s1gr1d]

Was added here: https://github.com/getsentry/sentry-javascript-bundler-plugins/pull/582/files#diff-5cae8150c6ef04a7e9356e37f46c0d36edc662f5a028861874a82ce1534b5e43