fix broken URLs and automate broken URL checks #70

This commit:
- Fixes broken URLs using archive.org or other references.
- Replaces tenforums.com URLs with better documentation as they tend to return HTTP status code 403 to tests and also are low quality source.
- Changes all insecure http sources to https alternatives
- Adds integration tests to check for broken URLs
  - There's logic implemented for having a delay inbetween when sending requests to same domains, however it's not used as the sources can respond to totally parallelized requests.
- Run test pipeline weekly to get notified about broken URls without commits

tests/integration/application/collections/StatusChecker/UrlPerDomainGrouper.ts

@@ -0,0 +1,19 @@
+export function groupUrlsByDomain(urls: string[]): string[][] {
+    const domains = new Set<string>();
+    const urlsWithDomain = urls.map((url) => ({
+        url,
+        domain: extractDomain(url),
+    }));
+    for (const url of urlsWithDomain) {
+        domains.add(url.domain);
+    }
+    return Array.from(domains).map((domain) => {
+        return urlsWithDomain
+            .filter((url) => url.domain === domain)
+            .map((url) => url.url);
+    });
+}
+
+function extractDomain(url: string): string {
+    return url.split('://')[1].split('/')[0].toLowerCase();
+}