Using angularHttpClient cause Fetch error:

[niklaskappler]

When initializing flagsmith with an angular httpClient, it causes fetch error "Fetch error: [object Object]"

private readonnly httpClient = inject(HttpClient);

flagsmith.init({
    environmentID: 'XXXXXXXXXX',
    onChange: () => {},
    angularHttpClient: this.http
  })

This is due the case that in the getJSON we check the response status number code for in between 200 and 300 (see flagsmith-core.ts#L869C1-L870C1). The angular fetch utils which builds the response object in case using the angular http client does not have any numeric status property. (see angular-fetch.ts#L10)

Verified in version 8.0.3 and back until 3.24.0.