c8y-docs

Investigate a Link Checker GitHub Actions workflow run (from a run URL, the current branch/PR, or a filed link-checker issue), find the root cause of each reported broken link, and fix it - by editing content, config.cjs (excludedLinks/resourceMocks), the cypress exception list, or the checker scripts themselves. Use when the user asks to investigate or fix broken links, a link-checker issue, or a failing/failed Link Checker workflow run.