chore: remove deprecated workflows:* skill aliases (#284)

* docs: capture codex skill prompt model

* fix: align codex workflow conversion

* chore: remove deprecated workflows:* skill aliases

The workflows:brainstorm, workflows:plan, workflows:work, workflows:review,
and workflows:compound aliases have been deprecated long enough. Remove them
and update skill counts (46 → 41) across plugin.json, marketplace.json,
README, and CLAUDE.md.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Trevin Chow <trevin@trevinchow.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

plugins/compound-engineering/AGENTS.md

@@ -40,7 +40,6 @@ agents/
 
 skills/
 ├── ce-*/          # Core workflow skills (ce:plan, ce:review, etc.)
-├── workflows-*/   # Deprecated aliases for ce:* skills
 └── */             # All other skills
 ```
 
@@ -57,7 +56,7 @@ skills/
 - `/ce:work` - Execute work items systematically
 - `/ce:compound` - Document solved problems
 
-**Why `ce:`?** Claude Code has built-in `/plan` and `/review` commands. The `ce:` namespace (short for compound-engineering) makes it immediately clear these commands belong to this plugin. The legacy `workflows:` prefix is still supported as deprecated aliases that forward to the `ce:*` equivalents.
+**Why `ce:`?** Claude Code has built-in `/plan` and `/review` commands. The `ce:` namespace (short for compound-engineering) makes it immediately clear these commands belong to this plugin.
 
 ## Skill Compliance Checklist