Merge pull request #169 from alphagov/add-vite-change

Add ADR 33 swapping Jest for Vitest

ADR/ADR033-swapping-jest-vitest.md

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+# ADR032: Swapping JS Test Framework Jest for Vitest
+
+Date: 2024-06-17
+
+## Status
+
+> Accepted
+
+## Context
+
+Jest tests are compatible with Vitest, but rather than running in a separate pipeline this allows us to consolidate into one run. It also means we have one less moving part to maintain.
+
+This is a retroactive record of this [PR](https://github.com/alphagov/forms-admin/pull/1209).
+
+## Decision
+
+Adopt Vitest for our JS testing framework.
+
+## Consequences
+
+One less pipeline and addition to our Javascript build. Everything is Vite based.