docs(wiki): add a Codeman Skill page with the skill GIFs

The skill only had a section inside "Driving Codeman From An Agent". It now
has its own page, docs/wiki/Codeman-Skill.md, built around three real runs:

- five Claude Code workers powering on in the tile grid (2026-10-15)
- eight worker tabs with lineage lines back to the lead (2026-10-15)
- a DeepSeek Harness worker and a Claude Code worker from one prompt
  (2026-10-10)

plus every install route, prompts that work as written, a run start to
finish, which workers it can drive, what it will and will not do on its
own, the Codex notes and what is in the skill. The page says that the grid
recording put each worker on the grid as it started, since sessions an
agent starts do not join the grid by themselves.

The agent page keeps a short skill section (the heading anchor stays) and
links to the new page; the sidebar, Home, FAQ and Settings Reference link
to it too. The FAQ answer no longer says the skill is enabled per case only.
docs/media-assets.md records the new embeds.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/wiki/Home.md

@@ -41,7 +41,8 @@ codeman web    # then open http://localhost:3000
 
 **Driving it from code**
 
-- [Driving Codeman From An Agent](Driving-Codeman-From-An-Agent) - the bundled skill, worker sessions, wait primitives.
+- [The Codeman Skill](Codeman-Skill) - one prompt, a whole crew: an agent starting and supervising worker sessions.
+- [Driving Codeman From An Agent](Driving-Codeman-From-An-Agent) - the `codeman agent` commands, the MCP server, wait primitives.
 - [HTTP API](HTTP-API) - the envelope, auth, the endpoint map, SSE events.
 - [Hooks And Integrations](Hooks-And-Integrations) - events flowing back into Codeman.
 
@@ -101,6 +102,7 @@ codeman web    # then open http://localhost:3000
 
 | Page                                                              | What it answers                              |
 | ----------------------------------------------------------------- | -------------------------------------------- |
+| [The Codeman Skill](Codeman-Skill)                                | How do I get an agent to start and run workers for me? |
 | [Driving Codeman From An Agent](Driving-Codeman-From-An-Agent)    | How does an agent spawn and drive workers?   |
 | [HTTP API](HTTP-API)                                              | What can I call, and what comes back?        |
 | [Hooks And Integrations](Hooks-And-Integrations)                  | How do I wire Codeman into something else?   |