Note: This task depends on: T290167: WiKit: Add error and warning states to TextArea in WiKit

In order to use the new error prop in Mismatch Finder, a pre-release including that prop must be made in WiKit. See the following docs on how to make a prerelease:

• https://wmde.github.io/wikit/?path=/story/documentation-release-management--page#creating-a-pre-release