v0.121.3

The project describes itself consistently on PyPI, npm and in its README, and its documentation base is the unified site.

Fixes

• The project describes itself consistently on PyPI, npm and in its README. The PyPI summary, the npm description and the README's opening line were three different texts, none of them a definition of the tool, and neither registry carried a homepage, documentation, issues or changelog link.
• Documentation links point at the unified site. The declared docs base was the retired per-project host; it is https://smmh.dev/rlsbl/ now, so generated sitemaps, feeds and llms.txt name the address that serves the pages.