This commit introduces a new expansion pack for WeChat Mini-Game
development and includes significant refinements based on user feedback to
ensure correctness and consistency with the project's architecture.
The new `bmad-wechat-mini-game-dev` expansion pack includes:
- A `config.yaml` for pack metadata.
- Specialized agents: `@wechat-game-designer` and `@wechat-game-dev`.
- A central `data/development-guidelines.md` for standards.
- A `checklists/game-story-dod-checklist.md` for quality control.
- A YAML-based GDD template and a page scaffolding task.
- A comprehensive `README.md`.
This work also includes the reversion of a previous, incorrect commit
that modified `bmad-core` files. Those changes have been reverted, and
the expansion pack is now correctly implemented to be fully
self-contained.