Astro Relative Links Integration

This Astro integration, currently at version 0.4.2, automatically converts absolute and `base`-relative paths within an Astro project to truly relative links during the build process. It addresses a common need for static sites that might be deployed to subdirectories or file systems where absolute paths can break. The project maintains a fairly active release cadence, providing fixes for bugs (e.g., Windows path issues, URL pathname spaces) and adding support for various HTML elements (like `video` poster, embedded styles) and other Astro ecosystem tools (like `astro-compress`, `astro-islands`). Its key differentiator is simplifying deployment flexibility for Astro sites by ensuring all assets, links, and resources are referenced relatively, eliminating the need for complex `base` path handling at runtime. It requires Astro version 3.0.0 or higher.