Interactive init: Add guided wizard mode alongside quick setup

[lbedner]

Summary

Redesign aegis init interactive mode to offer two paths:

1. Quick setup ("Ron Swanson mode") - Current direct approach, cleaned up
2. Guided wizard - Explanatory flow for newcomers

Problem

The current interactive flow jumps straight into asking questions without context. It assumes users already understand:

• What components vs services are
• What each option does
• How things combine together

This works for power users but creates friction for first-timers.

Proposed Solution

Opening Choice

How would you like to set up your project?

  > Quick setup     I know what I want
    Guided tour     Show me the options

Wizard Mode Features

Context panels - Rich terminal UI explaining each choice:

┌─────────────────────────────────────────────────┐
│  DATABASE                                       │
│                                                 │
│  PostgreSQL with SQLModel ORM, migrations via   │
│  Alembic, and connection pooling.               │
│                                                 │
│  Pairs well with: Auth, AI, Scheduler           │
└─────────────────────────────────────────────────┘
         [ Add ]    [ Skip ]    [ Learn more ]

Combination hints - Surface the emergent power:

• "You picked AI - most users also add Database for conversation history"
• "Auth + Database enables user-specific data and sessions"

Progressive disclosure - Basics first, details on demand

Quick Setup Mode

• Clean up current flow
• Minimal prompts, fast path
• For repeat users or those who've read docs

Technical Considerations

• Could use Textual or rich panels for the UI
• Wizard explanations could pull from component/service metadata
• Consider showing a "build preview" as selections are made

Value

• Lower barrier to entry for new users
• Better showcases what Aegis can do
• Power users unaffected (quick path remains)