Suggestion - Check `res.ok`

[ToyVo]

The FetchLike interface currently has json() and status as properties

typescript-http-client/src/http-client-generator.ts

Line 159 in ea8c10c

yield `}): Promise<{ json(): Promise<T>, status: number }>;`;

https://developer.mozilla.org/en-US/docs/Web/API/Response#instance_properties

I don't nessesarily think that we need a fully featured interface but I do think that text() and ok would be valuable additions

typescript-http-client/src/http-client-generator.ts

Lines 601 to 637 in ea8c10c

	if (this.method.returns)
	yield `const res = await this.fetch${returnType}(path`;
	else {
	yield `await this.fetch(path`;
	}
	yield ` ,{`;
	if (this.httpMethod.verb.value.toUpperCase() !== 'GET') {
	yield ` method: '${this.httpMethod.verb.value.toUpperCase()}',`;
	}
	yield ` headers,`;
	if (this.hasBody()) yield ` body,`;
	yield ` }`;
	yield `)`;
	yield ``;
	yield ``;
	if (this.method.returns?.value.kind === 'ComplexValue') {
	const responseTypeName = getTypeByName(
	this.service,
	this.method.returns.value.typeName.value,
	)!;
	const mapperName = this.dtoBuilder.buildMapperName(
	responseTypeName.name.value,
	'client-outbound',
	);
	if (this.options?.httpClient?.validation === 'zod') {
	yield `return mappers.${mapperName}(await res.json());`;
	} else {
	const sanitizerName = camel(
	`sanitize_${snake(responseTypeName.name.value)}`,
	);
	yield `return sanitizers.${sanitizerName}(mappers.${mapperName}(await res.json()));`;

then I think it would be valuable to check ok before we use res as if fetch returns a 4xx with some error that doesn't match the expected returnType, then the details of that error are swallowed

if the returnType is expected to be

export type GetSampleResponse = {
    errors: Error[];
    data?: GetSampleResponseData;
};

but we got an actual response of

{
  "status": 418,
  "name": "I'm a teapot"
}

then the response from HttpSampleService.getSample() will be {}