docs: added support for tests in www workspace (#14415)

* tests for components (WIP)

* finished adding tests to components

* added tests for providers

* add test command to doc tests

* fix imports

* exclude test files

* remove import

* add vitest as dev dependency

* fix build error

* ignore test files from eslint

* fix test from docs-ui

www/packages/docs-ui/src/components/EditButton/index.tsx

@@ -21,6 +21,7 @@ export const EditButton = ({ filePath, editDate }: EditButtonProps) => {
           "text-medusa-fg-subtle hover:text-medusa-fg-base",
           "text-compact-small-plus"
         )}
+        data-testid="edit-button"
       >
         <span>Edit this page</span>
         <ArrowUpRightOnBox />