CLI init prompts inconsistent - Enter should default to Yes for most prompts

[lbedner]

Bug Description

When running aegis init, pressing Enter without typing y/n has inconsistent behavior:

• Some prompts accept Enter as "yes"
• Most prompts require explicit y/n and re-prompt if you just press Enter

Expected Behavior

Enter should default to "yes" for most prompts, especially:

• Component selection ("Add Redis?", "Add Worker?", etc.)
• Final "Create this project?" confirmation

Current Behavior

Most typer.confirm() calls lack a default parameter, so Enter just re-prompts.

Files to Fix

• aegis/commands/init.py - line 384
• aegis/cli/interactive.py - lines 91, 98, 103, 112, 158, 171, 206, 238, and others

Fix

Add default=True to component/service selection prompts and final confirmation.
Keep default=False for:

• Destructive operations (remove commands)
• Opt-in for non-default options (LangChain over PydanticAI)