Add Jest to hold ring (#72)

radar/tools/jest.md

@@ -0,0 +1,12 @@
+---
+title: "Jest"
+ring: hold
+quadrant: "tools"
+tags: [typescript, frontend, web, backend, testing]
+---
+
+[Jest](https://jestjs.io/) is a JavaScript Testing Framework with a focus on simplicity.
+
+We choose to hold Jest because we are currently using it in our projects, but we are switching to Vitest. Vitest offers Typescript support out of the box, and it's a good fit for our projects, while Jest requires some additional configuration (ie. ts-jest, etc.).
+
+As Vitest offers compatibility with most of the Jest API and ecosystem libraries, so in most projects, it should be a drop-in replacement for Jest. Moreover, Vitest gives you a faster run for your unit tests and a jump in DX thanks to the default watch mode using Vite instant Hot Module Reload (HMR).