Add project scope documentation for AI playgroup registration system

Define complete non-technical scope for replacing Google Forms registration
with an AI-powered conversational agent. Includes:

- Registration data requirements (13 fields with validation rules)
- Knowledge base content (fees, regulations, schedule, FAQ from official PDFs)
- Conversation flow design with bilingual support (German/English)
- Agent personality guidelines (warm & friendly tone)
- Admin notification routing by playgroup type
- Email reminder system for incomplete registrations
- Data export formats (CSV/JSON)
- Channel configuration (email + chat)
- Release priorities (MVP scope defined)

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

openspec/changes/define-project-scope/content/registration-fields.md

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+# Registration Fields
+
+## Required Fields
+
+### Child Information
+
+| Field | Description | Required |
+|-------|-------------|----------|
+| Child's Full Name | First and last name of the child | Yes |
+| Date of Birth | Child's date of birth | Yes |
+| Special Needs / Medical Conditions | Any special requirements, allergies, medical conditions, or additional needs | Yes |
+
+### Parent/Guardian Information
+
+| Field | Description | Required |
+|-------|-------------|----------|
+| Parent/Guardian Name | Full name of primary contact | Yes |
+| Street Address | Street name and house number | Yes |
+| Postal Code | Swiss postal code (e.g., 8117) | Yes |
+| City | City/town name | Yes |
+| Phone Number | Contact phone number | Yes |
+| Email Address | Contact email address | Yes |
+
+### Emergency Contact
+
+| Field | Description | Required |
+|-------|-------------|----------|
+| Emergency Contact Name | Name of alternative contact person | Yes |
+| Emergency Contact Phone | Phone number for emergency contact | Yes |
+
+### Booking Selection
+
+| Field | Description | Required |
+|-------|-------------|----------|
+| Playgroup Type(s) | Indoor, Outdoor (Forest), or both | Yes |
+| Booking Days | Selected days based on playgroup type | Yes |
+
+#### Available Booking Options
+
+**Indoor Playgroup** (9:00 AM - 11:30 AM)
+- Monday
+- Wednesday
+- Thursday
+
+**Outdoor Forest Playgroup** (9:00 AM - 2:00 PM)
+- Monday
+
+*Note: Parents can register for either type, both types, or any combination of available days.*
+
+## Optional Fields
+
+None. All registration fields are required.
+
+---
+
+## Summary
+
+Total required fields: **13**
+- Child: 3 fields (name, DOB, special needs)
+- Parent: 6 fields (name, address, postal code, city, phone, email)
+- Emergency: 2 fields (name, phone)
+- Booking: 2 fields (type selection, day selection)