feat: implement Phase 1 Foundation for AutoScheduler GTD System

- Initialize npm workspaces monorepo (backend, frontend, shared-types)
- Scaffold NestJS backend with modules: Auth, Users, Tasks, Projects, Inbox, Health
- Create React frontend with Vite, TailwindCSS, Radix UI
- Implement TypeORM entities: User, InboxItem, Task, Project
- Add JWT authentication with Passport.js and bcrypt
- Build Inbox capture API (POST /inbox, GET /inbox, POST /inbox/:id/process)
- Create Inbox UI with quick-add form and GTD processing workflow modal
- Configure Docker Compose stack (postgres, redis, backend, frontend)
- Add health check endpoint with database/Redis status
- Write unit tests for auth and inbox services

Phase 1 features complete:
- GTD Inbox Capture: Manual tasks via web form quick-add
- GTD Processing Workflow: Interactive inbox processing interface

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,23 @@
+# Database
+DB_HOST=localhost
+DB_PORT=5432
+DB_USERNAME=postgres
+DB_PASSWORD=postgres
+DB_DATABASE=autoscheduler
+
+# Redis
+REDIS_URL=redis://localhost:6379
+
+# JWT
+JWT_SECRET=your-secret-key-change-in-production
+JWT_REFRESH_SECRET=your-refresh-secret-key-change-in-production
+JWT_EXPIRES_IN=1h
+
+# Environment
+NODE_ENV=development
+
+# Frontend
+FRONTEND_URL=http://localhost:5173
+
+# Encryption (for credential storage)
+ENCRYPTION_KEY=your-32-byte-encryption-key-here