tooling: add example template to .github/replies.yml

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes #000
• That issue was marked as accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Makes the passive aggressive phrasing slightly less so, and tags the user with it.

cc @Pinjasaur - should make testing #52 smoother!

[JoshuaKGoldberg]

@

I tested this locally with node on the CLI to confirm this wouldn't cause YAML parsing to barf:

const yaml = require("js-yaml");
const fs = require("fs");

text = fs.readFileSync(".github/replies.yml").toString()
'replies:\n' +
  '  - body: |\n' +
  `      <img width="488" alt="Maury meme: You checked 'I have searched for related issues'. A cursory issue search related issues determined that was a lie." src="https://user-images.githubusercontent.com/3335181/186501430-7f4c481a-f557-48b0-826c-74bb8434f4d5.png">\\\n` +
  '      Duplicate of #<insert issue>. Thanks for posting @{{user.login}} - though, next time, please use the search. 😄\n' +
  '    name: Clearly Duplicate Issue\n'

config = yaml.load(text);
{
  replies: [
    {
      body: `<img width="488" alt="Maury meme: You checked 'I have searched for related issues'. A cursory issue search related issues determined that was a lie." src="https://user-images.githubusercontent.com/3335181/186501430-7f4c481a-f557-48b0-826c-74bb8434f4d5.png">\\\n` +
        'Duplicate of #<insert issue>. Thanks for posting @{{user.login}} - though, next time, please use the search. 😄\n',
      name: 'Clearly Duplicate Issue'
    }
  ]
}

[JoshuaKGoldberg]

@all-contributors please add @JoshuaKGoldberg for code.

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