Fixing typings to enable prefixing of ipc messages without inducing a value not used error

[StoneT2000]

Currently we do something like this

import type { MainProcessApi } from '../types';
import * as actions from './actions';

const DimensionsApi = {
  prefix: 'dim',
  actions,
} as const;

export type Dimensions = typeof DimensionsApi;

export default DimensionsApi;

// eslint-disable-next-line @typescript-eslint/no-unused-vars
// @ts-expect-error - want to check for typing but ignore no unused locals here
const typecheck = DimensionsApi as MainProcessApi; // should error if it doesn't conform

to create the ipc channels really easily with typings so both the main and renderer process have access to proper typings for what info can go across the ipc channels. We additionally want to be able to prefix the name of the messages so we sort of scope ipc messages without cluttering. However, a consequence is that we get this unused variable error in the current implementation.