status.rs: Make json output more verbose

[Asiderr]

Currently if the status response has no status code, json output contains only a text field which gives no real information about the cause of the problem. The patch adds field with more detailed information when the status response contains some details.

[mre]

Nice.
Do you have an example of how the output looks like?
Can it be added as an integration test, similar to this?

lychee/lychee-bin/tests/cli.rs

Lines 136 to 147 in 54e6386

	#[test]
	fn test_exclude_all_private() -> Result<()> {
	test_json_output!(
	"TEST_ALL_PRIVATE.md",
	MockResponseStats {
	total: 7,
	excludes: 7,
	..MockResponseStats::default()
	},
	"--exclude-all-private"
	)
	}

[Asiderr]

Yes, I have. Currently it looks like this:

{
  "total": 77,
  "successful": 36,
  "unknown": 0,
  "unsupported": 0,
  "timeouts": 0,
  "redirects": 0,
  "excludes": 39,
  "errors": 2,
  "cached": 0,
  "success_map": {},
  "fail_map": {
    "./themes/dasharo/layouts/partials/essentials/style.html": [
      {
        "url": "https://use.fontawesome.com/",
        "status": {
          "text": "Failed: Network error",
          "code": 404
        }
      },
      {
        "url": "https://expired.badssl.com/",
        "status": {
          "text": "Failed: Network error",
          "details": "error:0A000086:SSL routines:tls_post_process_server_certificate:certificate verify failed:../ssl/statem/statem_clnt.c:1883: (certificate has expired)"
        }
      }
    ]
  },
  "suggestion_map": {},
  "excluded_map": {},
  "duration_secs": 3,
  "detailed_stats": false
}

And this is how it looks without this patch (latest stable):

{
  "total": 77,
  "successful": 36,
  "unknown": 0,
  "unsupported": 0,
  "timeouts": 0,
  "redirects": 0,
  "excludes": 39,
  "errors": 2,
  "cached": 0,
  "success_map": {},
  "fail_map": {
    "./themes/dasharo/layouts/partials/essentials/style.html": [
      {
        "url": "https://use.fontawesome.com/",
        "status": {
          "text": "Failed: Network error",
          "code": 404
        }
      },
      {
        "url": "https://expired.badssl.com/",
        "status": {
          "text": "Failed: Network error"
        }
      }
    ]
  },
  "suggestion_map": {},
  "excluded_map": {},
  "duration_secs": 3,
  "detailed_stats": false
}

Can it be added as an integration test, similar to this?

I'll try to do this in a moment.

[Asiderr]

@mre Test added in the ca14655.

[mre]

Looking great! Thanks a lot @Asiderr 😃