feat: continue working on indexer's absence

[rompemoldes]

Stop the app from crashing due to Error Responses from the Indexer.

It also improves the handling of the environment variable stored on indexer.graphqlEndpoint.
Now 'none' is case insensitive.

[arty-name]

A nicer flow could have been:

  const response = await got.post(indexer.graphqlEndpoint, { throwOnHttpErrors: false, json: { query } });
  if (!response.ok) { /* handle error */ }
  const { data } = await response.json<FetchedData<ExpectedQueryResults>>();

[rompemoldes]

I tried setting throwHttpErrors: false on the options of the got.post requests and it still throws for me.

You can check out my tries on the cTypeHub repository.

This version is working. Let's use it!