request interception

[sjorsdonkers]

Depends on: #922
Also reenables: http_request_start

TODO:

• Enable: patterns
• continueWithAuth also Enable.handleAuthRequests
• fulfillRequest
• InterceptResponse, also in continueRequest
• continueRequest.postData
• continueRequest.headers
• Common headers and start_callback before intercept
• Confirm string lifetime of waiting Requests

Example playwright fragment:

const page = await context.newPage();

await page.route('*', (route, request) => {
  console.log(`Request ROUTE: ${request.method()} ${request.url()}`);
  route.continue({url: "http://lightpanda.io/", method: "GET"});// or route.abort();
});

await page.goto('/campfire-commerce/');