fix(preset-algolia): ensure "ts-ignore" is present in the output

[Haroenv]

There's no real way to enforce this, but /** comments get preserved in the output, but // comments don't. This is typescript behaviour that's not well documented, as removeComments isn't even false in https://www.typescriptlang.org/tsconfig/#removeComments

cc @slorber for facebook/docusaurus#8261 (comment)

follow up on #1002

[codesandbox-ci]

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