Improve URL checks to reduce false-negatives

This commit improves the URL health checking mechanism to reduce false
negatives.

- Treat all 2XX status codes as successful, addressing issues with codes
  like `204`.
- Improve URL matching to exclude URLs within Markdown inline code block
  and support URLs containing parentheses.
- Add `forceHttpGetForUrlPatterns` to customize HTTP method per URL to
  allow verifying URLs behind CDN/WAFs that do not respond to HTTP HEAD.
- Send the Host header for improved handling of webpages behind proxies.
- Improve formatting and context for output messages.
- Fix the defaulting options for redirects and cookie handling.
- Update the user agent pool to modern browsers and platforms.
- Add support for randomizing TLS fingerprint to mimic various clients
  better, improving the effectiveness of checks. However, this is not
  fully supported by Node.js's HTTP client; see nodejs/undici#1983 for
  more details.
- Use `AbortSignal` instead of `AbortController` as more modern and
  simpler way to handle timeouts.

tests/shared/Text.ts

@@ -0,0 +1,29 @@
+import { isString } from '@/TypeHelpers';
+
+export function indentText(
+  text: string,
+  indentLevel = 1,
+): string {
+  validateText(text);
+  const indentation = '\t'.repeat(indentLevel);
+  return splitTextIntoLines(text)
+    .map((line) => (line ? `${indentation}${line}` : line))
+    .join('\n');
+}
+
+export function splitTextIntoLines(text: string): string[] {
+  validateText(text);
+  return text
+    .split(/[\r\n]+/);
+}
+
+export function filterEmpty(texts: readonly (string | undefined | null)[]): string[] {
+  return texts
+    .filter((title): title is string => Boolean(title));
+}
+
+function validateText(text: string): void {
+  if (!isString(text)) {
+    throw new Error(`text is not a string. It is: ${typeof text}\n${text}`);
+  }
+}