Make dataProvider types generic

[andrico1234]

Is your feature request related to a problem? Please describe.
The types for the data provider methods aren't generic, and are often written like the following:

interface UpdateParams {
  id: Identifier;
  data: any;
  previousData: Record;
}

This means that when I create a function like this:

const dataProvider: DataProvider = {
  update: (resource, params) => {
      return updateResource(data);
  },
};

async function updateResource(body: UpdateParams) {
  const { data } = body
  // fetch request
}

The type of body is any, even though it's likely I know what the type is at this point.

Describe the solution you'd like

interface UpdateParams<T = any> {
  id: Identifier;
  data: T;
  previousData: Record;
}

This should be a backward compatible type as the generic defaults to any which is existing behaviour.

If you're happy for this to go in, I'll be happy to make a PR to update all of the dataProvider method types.

[djhi]

Hi @andrico1234 and thanks for the suggestion! We know we have to improve the types around the dataProvider and any help is welcome! Please open a PR so that we can discuss how we do it and iterate.

[andrico1234]

Sounds good! i'll whip up something and get your thoughts

[andrico1234]

Super tiny MR here

[fzaninotto]

Fixed by #5934