feat(docs): add plausible to docs

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Name	Status	Preview	Comments	Updated (UTC)
abby-docs	❌ Failed (Inspect)			Nov 3, 2023 6:43am
abby-opensource	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 3, 2023 6:43am

[cstrnt]

Current dependencies on/for this PR:

• main
  • PR #96 👈

This stack of pull requests is managed by Graphite.

[cstrnt]

@CakeWithDivinity build fails since we don't have a preview for the open-source version for the docs set up