Add Factory Droid to README, bump to 0.4.0, add npm publish workflow

- Document Droid as third converter target alongside OpenCode and Codex
- Bump package version 0.3.0 → 0.4.0 for new target feature
- Add CHANGELOG entry for 2.32.0 with Droid details
- Add GitHub Actions workflow to publish to npm on release

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

plugins/compound-engineering/CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to the compound-engineering plugin will be documented in thi
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.32.0] - 2026-02-11
+
+### Added
+
+- **Factory Droid target** — New converter target for [Factory Droid](https://docs.factory.ai). Install with `--to droid` to output agents, commands, and skills to `~/.factory/`. Includes tool name mapping (Claude → Factory), namespace prefix stripping, Task syntax conversion, and agent reference rewriting. 13 new tests (9 converter + 4 writer). ([#174](https://github.com/EveryInc/compound-engineering-plugin/pull/174))
+
+---
+
 ## [2.31.1] - 2026-02-09
 
 ### Changed