Addresses reviewer feedback that "Integrating" could be misread as
integrating skills into a workflow rather than into a client. Renames
`integrating-skills.mdx` to `adding-skills-support.mdx` and updates all
references in `docs.json`, `home.mdx`, and `what-are-skills.mdx`.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Jonathan Hefner