fix(ci): fix docs smoke test and setup comprehensive redirects

[ctreffs]

This PR fixes the documentation smoke test and implements a robust redirect structure for GitHub Pages.

Changes:

• Fix Smoke Test: Updated the curl check in docs.yml to search for "Documentation" instead of "FirebladeMath". Since the DocC output is a Single Page Application (SPA), the library name is injected via JavaScript and not present in the initial static HTML shell, which caused the previous check to fail.
• Enhanced Redirects: Implemented a new redirect strategy to support alias and legacy URLs:
  • math/ -> math/latest/documentation/fireblademath/
  • math/latest/ -> math/main/documentation/fireblademath/
  • math/latest/documentation/fireblademath/ -> math/main/documentation/fireblademath/
  • math/documentation/fireblademath/ -> math/main/documentation/fireblademath/
• Verification: Updated the CI smoke test to verify the new redirect logic at the root URL.