Mocil 프로젝트 요구사항 정의서(PRD) 추가

[google-labs-jules]

이 변경 사항은 Mocil 프로젝트의 한국어 요구사항 정의서(PRD)를 추가합니다. DRIFT.md의 메뉴 구조와 INIT-Schema.md의 데이터베이스 스키마를 바탕으로 작성되었으며, 프로젝트의 기술 스택과 초기 개발 범위인 기본 설정, 활동가 관리, 이용자 관리 기능에 대한 상세한 명세를 담고 있습니다.

Fixes #

---

PR created automatically by Jules for task 16787944103153158124 started by @from104

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

---

For security, I will only act on instructions from the user who triggered this task.

New to Jules? Learn more at jules.google/docs.