refactor(agents): remove duplicate every-style-editor agent

The every-style-editor agent file was a duplicate of the existing
every-style-editor skill. Agent files are eagerly loaded into the
Task tool definition on every API call (~100-200 tokens each),
while skills are lazy-loaded only when invoked. Removing the
duplicate saves tokens and eliminates potential runtime errors
when the agent is invoked via Task tool instead of Skill tool.

Changes:
- Delete agents/workflow/every-style-editor.md (skill version
  in skills/every-style-editor/ already exists)
- Update README.md workflow agent count from 5 to 4
- Update plugin.json agent counts from 29 to 28

Fixes #156

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/compound-engineering/README.md

@@ -53,12 +53,11 @@ Agents are organized into categories for easier discovery.
 | `design-iterator` | Iteratively refine UI through systematic design iterations |
 | `figma-design-sync` | Synchronize web implementations with Figma designs |
 
-### Workflow (5)
+### Workflow (4)
 
 | Agent | Description |
 |-------|-------------|
 | `bug-reproduction-validator` | Systematically reproduce and validate bug reports |
-| `every-style-editor` | Edit content to conform to Every's style guide |
 | `lint` | Run linting and code quality checks on Ruby and ERB files |
 | `pr-comment-resolver` | Address PR comments and implement fixes |
 | `spec-flow-analyzer` | Analyze user flows and identify gaps in specifications |