Add check-published-links tool (v0.1.38)

New tool that wraps linkchecker to validate links on published HTML
documentation with:

- URL rewriting for misresolved paths on documentation platforms
- Smart false positive handling (host:port placeholders, Maven Central 403s)
- Configuration file support with [settings], [ignore-patterns], and
  [rewrite-rules] sections
- Single URL and bulk validation modes
- Detailed reports with error categorization
- Configurable timeout and reports directory

Requires linkchecker to be installed separately.

Author: rolfedh

README.md

@@ -61,7 +61,8 @@ doc-utils --version  # Show version
 
 | Tool | Description | Usage |
 |------|-------------|-------|
-| **`validate-links`** | Validates all links in documentation, with URL transposition for preview environments | `validate-links --transpose "https://prod--https://preview"` |
+| **`validate-links`** | Validates links in AsciiDoc source files, with URL transposition for preview environments | `validate-links --transpose "https://prod--https://preview"` |
+| **`check-published-links`** | Validates links on published HTML docs using linkchecker, with URL rewriting for misresolved paths | `check-published-links https://docs.example.com/guide/` |
 | **`extract-link-attributes`** | Extracts link/xref macros with attributes into reusable definitions | `extract-link-attributes --dry-run` |
 | **`replace-link-attributes`** | Resolves Vale LinkAttribute issues by replacing attributes in link URLs | `replace-link-attributes --dry-run` |
 | **`format-asciidoc-spacing`** | Standardizes spacing after headings and around includes | `format-asciidoc-spacing --dry-run modules/` |