[Feature]: Add preview feature for templates before creation

[Sehnya]

Problem Statement

Users currently cannot see what files or structure will be generated by a template before actually creating the project.

Proposed Solution

Add a CLI option to preview the contents and structure of a template before running the create command.

Alternative Solutions

Provide screenshots or documentation of starter templates.

Feature Category

Template System

Priority Level

Medium - Would improve workflow

Use Cases

1. When choosing between templates.
2. When teaching new users about project scaffolding.
3. When customizing starters.

Examples

peezy preview --template react

Additional Context

Could output a tree view or list of files to terminal.

Checklist

• I have searched existing issues to ensure this is not a duplicate
• I have provided a clear problem statement and proposed solution
• This feature aligns with Peezy CLI's goals of simplifying project initialization