feat: setup query index for sidekick

[dylandepass]

Please always provide the GitHub issue(s) your PR is for, as well as test URLs where your change can be observed (before and after):

Fix #

Test URLs:

• Before: https://main--helix-tools-website--adobe.hlx.live/
• After: https://sidekick-query-index--helix-tools-website--adobe.hlx.live/

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Commits

* [5a06907](https://github.com/adobe/helix-tools-website/commit/5a06907947db35a950eb0b8830363393097bede7) :white_check_mark: (latest) * [131b035](https://github.com/adobe/helix-tools-website/commit/131b0358ed7957dab4b27921af74ccf0443e5603) :white_check_mark: * [991f1fc](https://github.com/adobe/helix-tools-website/commit/991f1fc3e58be4e624853107314f919a22c16d13) :white_check_mark: * [6b030ba](https://github.com/adobe/helix-tools-website/commit/6b030bad44c5d46238d7d7b931d9272493345470) :white_check_mark: * [97de00b](https://github.com/adobe/helix-tools-website/commit/97de00be17c43fa0df4ceed3a678a8182c193eff) :white_check_mark:

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