🚀 Feature: Add an option for repository emoji

[JoshuaKGoldberg]

Bug Report Checklist

• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Overview

Right now, CTA hardcodes the 💖 emoji in generated docs files. For example:

create-typescript-app/src/blocks/blockContributingDocs.ts

Line 14 in 1d60fc3

Thanks for your interest in contributing to \`${options.repository}\`! 💖

...but in my experience, most of my repositories pick a single relative-unique-ish emoji from other repositories. It'd be nice to use that emoji everywhere.

CTA itself has switched to 💝 since Bingo is 🎁.

Let's add an option for emoji that just defaults to "💖". It should be used in created files wherever 💖 is currently.

Additional Info

💖